Difference between revisions of "Type K-8 No.13 late"

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m (U38088265 moved page Type K-8 (1944) to Type K-8 No.13 late: Renamed in 2.7)
 
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{{Specs-Card|code=jp_kusen_tei_13_1944}}
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{{Specs-Card
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|code=jp_kusen_tei_13_1944
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|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg}}
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}}
  
 
== Description ==
 
== Description ==
<!--In the first part of the description, cover the history of the ship’s creation and military application. In the second part, tell the reader about using this ship in the game. Add a screenshot. If a beginner player has a hard time remembering vehicles by name, a picture will help them identify the ship in question.-->
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<!-- ''In the first part of the description, cover the history of the ship's creation and military application. In the second part, tell the reader about using this ship in the game. Add a screenshot: if a beginner player has a hard time remembering vehicles by name, a picture will help them identify the ship in question.'' -->
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
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The '''{{Specs|name}}''' is a rank {{Specs|rank}} Japanese sub-chaser {{Battle-rating}}. It was introduced in [[Update 1.89 "Imperial Navy"]].
{{Break}}
 
The '''{{specs|name}}''' is a rank {{specs|rank}} Japanese sub-chaser {{Battle-rating}}. It was introduced in [[Update 1.89 "Imperial Navy"]].
 
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and armour ===
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{{Specs-Fleet-Armour}}
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<!-- ''Talk about the vehicle's armour. Note the most well-defended and most vulnerable zones, e.g. the ammo magazine. Evaluate the composition of components and assemblies responsible for movement and manoeuvrability. Evaluate the survivability of the primary and secondary armaments separately. Don't forget to mention the size of the crew, which plays an important role in fleet mechanics. Save tips on preserving survivability for the "Usage in battles" section. If necessary, use a graphical template to show the most well-protected or most vulnerable points in the armour.'' -->
 
[[File:Type K-8 Survivability.jpg|thumb|left|Type K-8 can survive a few ships simultaneously creating a spectacle with all the shrapnel flying off.]]
 
[[File:Type K-8 Survivability.jpg|thumb|left|Type K-8 can survive a few ships simultaneously creating a spectacle with all the shrapnel flying off.]]
<!--''Talk about the vehicle's armour. Note the most well-defended and most vulnerable zones, e.g. the ammo magazine. Evaluate the composition of components and assemblies responsible for movement and manoeuvrability. Evaluate the survivability of the primary and secondary armament separately. Don't forget to mention the size of the crew, which plays an important role in fleet mechanics. Save tips for preserving survivability in the "Use in battle" section.''
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The {{specs|name}}'s primary characteristic is her exceptional survivability for the battle rating. With a crew count of {{specs|crew}}, she's got nearly the double of the second-best vessel, and nearly 7 times the crew count of any US vessel in this battle rating. She's also the only ship within the battle rating to have 7 hull sections, at least one more than all the other ships. Overall this gives her an outstanding ability to survive even a focused gun fire from multiple boats.
  
''If necessary, use a graphics template to show the most well-protected or most vulnerable points in the armour.''-->
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That said though - the {{PAGENAME}} has some weak points to her survivability. First of all, she has one of the thinnest armour layers, making it impossible to deflect even the lowest calibre guns at nearly any range. Secondly her primary gun is fully exposed, leading to it being often disabled under enemy fire. And lastly her ammunition storage is exposed fully over the water level, directly under the primary gun, making for a significant chances of ammo-racking the ship.
The {{specs|name}}'s primary characteristic is her exceptional survivability for the BR. With a crew count of {{specs|crew}} she's got nearly the double of the second-best vessel, and nearly 7 times the crew count of any US vessel in this BR. She's also the only ship within her BR to have 7 hull sections, at least one more than all the other ships. Overall this gives her an outstanding ability to survive even a focused gun fire from multiple boats.
 
  
That said though - she has some weak points to her survivability. First of all, she has one of the thinnest armour layers, making it impossible to deflect even the lowest calibre guns at nearly any range. Secondly her primary gun is fully exposed, leading to it being often disabled under enemy fire. And lastly her ammunition storage is exposed fully over the water level, directly under the primary gun, making for a significant chances of ammo-racking the ship.
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=== Mobility ===
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{{Specs-Fleet-Mobility}}
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<!-- ''Write about the ship's mobility. Evaluate its power and manoeuvrability, rudder rerouting speed, stopping speed at full tilt, with its maximum forward and reverse speed.'' -->
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With the top speed of 33km/h, she's a relatively large, lumbering target. It's not helped by an average rudder turning speed of 4.85s. Overall it's an attractive target for a torpedo attacks and a long-range gunnery fire.
  
=== Mobility ===
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{{NavalMobility}}
<!--''Write about the ship’s mobility. Evaluate its power and manoeuvrability, rudder rerouting speed, stopping speed at full tilt, with its maximum forward speed and reverse speed.''-->
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With the top speed of 33km/h she's a relatively large, lumbering target. It's not helped by an average rudder turning speed of 4.85s. Overall it's an attractive target for a torpedo attacks and a long-range gunnery fire.
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=== Modifications and economy ===
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{{Specs-Economy}}
  
 
== Armament ==
 
== Armament ==
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{{Specs-Fleet-Armaments}}
 
=== Primary armament ===
 
=== Primary armament ===
<!--''Provide information about the characteristics of the primary armament. Evaluate their efficacy in battle based on their reload speed, ballistics and the capacity of their shells. Add a link to the main article about the weapon: <code><nowiki>{{main|Weapon name (calibre)}}</nowiki></code>.''
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{{Specs-Fleet-Primary}}
''Broadly describe the ammunition available for the primary armament, and provide recommendations on how to use it and which ammunition to choose.''-->
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<!-- ''Provide information about the characteristics of the primary armament. Evaluate their efficacy in battle based on their reload speed, ballistics and the capacity of their shells. Add a link to the main article about the weapon: <code><nowiki>{{main|Weapon name (calibre)}}</nowiki></code>. Broadly describe the ammunition available for the primary armament, and provide recommendations on how to use it and which ammunition to choose.'' -->
 
[[File:Type K-8 Type 3.jpg|thumb|left|The Type 3 cannon firing a visible HE shell]]
 
[[File:Type K-8 Type 3.jpg|thumb|left|The Type 3 cannon firing a visible HE shell]]
 
{{main|8 cm/40 Type 3 (76 mm)}}
 
{{main|8 cm/40 Type 3 (76 mm)}}
Ship's primary armament is a single 8cm Type 3 cannon. It's firing up to 20 shots/minute of Type 0 HE shells that are relatively potent, with 480g of TNT, being able to one-shot individual hull sections on most boats she'll encounter, but struggling with larger units like submarine chasers.
 
  
Gun was originally designed as a high-elevation one, historically being often mounted on a larger ships for an anti-aircraft duty. As a result her horizontal guidance is ±180° and vertical -7°/+75°, covering most of the field around the ship, with exception of the deadzone behind the conning tower, although the gun can still engage airborne targets by firing above it. Targetting speed is slow, just 9.4°/s, however it's sufficient to engage targets bar fast attack boats in an extremely short range where machine guns engage them anyway.
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The {{PAGENAME}}'s primary armament is a single 8 cm Type 3 cannon. It can fire up to 20 shots/minute of Type 0 HE shells that are relatively potent, with 480 g of TNT, being able to one-shot individual hull sections on most boats she'll encounter, but struggling with larger units like submarine chasers.
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The gun was originally designed as a high-elevation one, historically being often mounted on a larger ships for anti-aircraft duty. As a result, her horizontal guidance is ±180° and vertical -7°/+75°, covering most of the field around the ship with exception of the deadzone behind the conning tower, although the gun can still engage airborne targets by firing above it. Targetting speed is slow, just 9.4°/s, however it's sufficient to engage targets bar fast attack boats in an extremely short range where machine guns engage them anyway.
 
{{Clear|left}}
 
{{Clear|left}}
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=== Secondary armament ===
 
=== Secondary armament ===
<!--''Some ships are fitted with weapons of various calibres. The secondary armament is defined as the weapon chosen with the control <code>Select secondary weapon</code>. Evaluate the secondary armament and give advice on how to use them. Describe the ammunition available for the secondary armament. Provide recommendations on how to use them and which ammunition to choose. Remember that anti-air armament, even heavy calibre weapons, belong in the next section.''-->
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{{Specs-Fleet-Secondary}}
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<!-- ''Some ships are fitted with weapons of various calibres. Secondary armaments are defined as weapons chosen with the control <code>Select secondary weapon</code>. Evaluate the secondary armaments and give advice on how to use them. Describe the ammunition available for the secondary armament. Provide recommendations on how to use them and which ammunition to choose. Remember that any anti-air armament, even heavy calibre weapons, belong in the next section. If there is no secondary armament, remove this section.'' -->
 
[[File:Type K-8 Type 93.jpg|thumb|right|Two Type 96 automatic cannons on a platform have a wide firing arcs, being able to effectively engage most targets]]
 
[[File:Type K-8 Type 93.jpg|thumb|right|Two Type 96 automatic cannons on a platform have a wide firing arcs, being able to effectively engage most targets]]
 
{{main|25 mm/60 Type 96 (25 mm)}}
 
{{main|25 mm/60 Type 96 (25 mm)}}
  
Same as the predecessors [[Type_K-3_/_No.1_Class|Type K-3]] and [[Type_K-7_/_No.4_Class|Type K-7]], this boat is equipped with three single mounting 25 mm Type 96 autocannons, which make for a very potent secondary weapons. The HE type rounds this gun fires have no trouble knocking out PT boats and even larger support vessels, sometimes even with one magazine all together. Alternatively AP racks can be used for handling armoured boats with a penetration of up to 37mm at 1000m range, which is more than enough to penetrate even hardened armor gun shield of German boats.
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Same as the predecessors [[Type_K-3_/_No.1_Class|Type K-3]] and [[Type_K-7_/_No.4_Class|Type K-7]], this boat is equipped with three single mounting 25 mm Type 96 autocannons, which make for a very potent secondary weapons. The HE type rounds this gun fires have no trouble knocking out PT boats and even larger support vessels, sometimes even with one magazine all together. Alternatively, AP racks can be used for handling armoured boats with a penetration of up to 37mm at 1000m range, which is more than enough to penetrate even hardened armor gun shield of German boats.
  
 
Two of the cannons are placed on a platform in front of the smoke funnel, while the third one is located right behind the primary cannon, in a super-firing position. Additionally due to the HE these cannons can engage targets at range and still do damage. This cannon can also cause critical damage to aircraft with only a single hit.
 
Two of the cannons are placed on a platform in front of the smoke funnel, while the third one is located right behind the primary cannon, in a super-firing position. Additionally due to the HE these cannons can engage targets at range and still do damage. This cannon can also cause critical damage to aircraft with only a single hit.
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Note that the autocannon in a front mount has significantly decreased guidance arc. While for the two guns on the platform amidship have horizontal guidance of ±180°, the front one has only -90°/+40°, which means that the guns have a relatively narrow arc where majority of the secondary guns can fire.
 
Note that the autocannon in a front mount has significantly decreased guidance arc. While for the two guns on the platform amidship have horizontal guidance of ±180°, the front one has only -90°/+40°, which means that the guns have a relatively narrow arc where majority of the secondary guns can fire.
 
{{Clear|right}}
 
{{Clear|right}}
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=== Anti-aircraft armament ===
 
=== Anti-aircraft armament ===
<!--''An important part of the ship’s armament responsible for air raid defence. Anti-aircraft armament is defined by the weapon chosen with the control <code>Select anti-aircraft weapons</code>. Talk about the ship’s anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets.''-->
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{{Specs-Fleet-AA}}
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<!-- ''An important part of the ship's armament responsible for air defence. Anti-aircraft armament is defined by the weapon chosen with the control <code>Select anti-aircraft weapons</code>. Talk about the ship's anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets. If there are no anti-aircraft armaments, remove this section.'' -->
 
[[File:Type K-8 Type 96 cannon.jpg|thumb|left|Low-mounted dual Type 93 is relatively accurate and covers the entirety of the rear of the ship]]
 
[[File:Type K-8 Type 96 cannon.jpg|thumb|left|Low-mounted dual Type 93 is relatively accurate and covers the entirety of the rear of the ship]]
 
{{main|Type 93 (13.2 mm)}}
 
{{main|Type 93 (13.2 mm)}}
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Unlike predecessors, this boat have separate anti-aircraft armament which consists from twin Type 93 (13.2 mm) machine guns on a single mount at the rear of the ship. It has a notable advantage in vertical guidance over the Type 96 automatic cannons, being able to aim at targets up to +80° vs +65° for the Type 96. Also having nearly double the fire rate further increases its chances of landing successful shots at the enemy. That said though, even with two bullets hitting the enemy, the overall damage is much lower, with 13.2 mm HEI bullet bearing 1g TNT, while 25mm HEI bears 15.3g TNT.
 
Unlike predecessors, this boat have separate anti-aircraft armament which consists from twin Type 93 (13.2 mm) machine guns on a single mount at the rear of the ship. It has a notable advantage in vertical guidance over the Type 96 automatic cannons, being able to aim at targets up to +80° vs +65° for the Type 96. Also having nearly double the fire rate further increases its chances of landing successful shots at the enemy. That said though, even with two bullets hitting the enemy, the overall damage is much lower, with 13.2 mm HEI bullet bearing 1g TNT, while 25mm HEI bears 15.3g TNT.
 
{{Clear|left}}
 
{{Clear|left}}
=== Special armament ===
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<!--''Depth charges, mines, rocket launchers and missiles are also effective in skilled hands and can take an off-guard opponent by surprise. Evaluate the ammunition of this type of armament and rate its performance in combat.''-->
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=== Additional armament ===
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{{Specs-Fleet-Additional}}
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<!-- ''Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.'' -->
 
{{main|Type 95 depth charge}}
 
{{main|Type 95 depth charge}}
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''Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.''
  
 
== Usage in battles ==
 
== Usage in battles ==
<!--''Describe the technique of using this ship, the characteristics of her use in a team and tips on strategy. Abstain from writing an entire guide – don’t try to provide a single point of view, but give the reader food for thought. Talk about the most dangerous opponents for this vehicle and provide recommendations on fighting them. If necessary, note the specifics of playing with this vehicle in various modes (AB, RB, SB).''-->
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<!-- ''Describe the technique of using this ship, the characteristics of her use in a team and tips on strategy. Abstain from writing an entire guide – don't try to provide a single point of view, but give the reader food for thought. Talk about the most dangerous opponents for this vehicle and provide recommendations on fighting them. If necessary, note the specifics of playing with this vehicle in various modes (AB, RB, SB).'' -->
Primary role of the Type K-8 is to lure enemy's attention away from more vulnerable targets. Being large, intimidating ship it will often be under fire of a number of enemy units. And often times it can freely survive those engagements, largely thanks to it's 8cm main gun packing powerful punch, although delivered at a low fire rate, and assisted by a number of secondaries at all angles.
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The primary role of the Type K-8 is to lure enemy's attention away from more vulnerable targets. Being large, intimidating ship it will often be under fire of a number of enemy units. And often times it can freely survive those engagements, largely thanks to its 8cm main gun packing powerful punch, although delivered at a low fire rate, and assisted by a number of secondaries at all angles.
  
 
=== Pros and cons ===
 
=== Pros and cons ===
<!--''Summarize and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".''-->
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<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->
  
 
'''Pros:'''
 
'''Pros:'''
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'''Cons:'''
 
'''Cons:'''
* Slow speed and low maneuverability
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* Subchaser
* Large target
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** Slow speed and low manoeuvrability
* No torpedoes
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** Large target
  
 
== History ==
 
== History ==
<!--''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/ History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></nowiki></code>, as well as adding them at the end of the article.''-->
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<!-- ''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the ship and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Ship-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the ship's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
  
Submarine chasers of the project number K8, also known as the No.13-class submarine chasers (第十三号型駆潜艇, Dai 13 Gō-gata Kusentei) were built under Maru 4 Keikaku programme, totalling 15 ships built from 1940 till 1942. The primary principle of the design was to build capable ships quickly and cheaply. Resulting design was using cheaper, more common steel used on a merchant ships, nor military units. But an additional reinforcements created a notably sturdier hull, what also helped avoiding secondary vibrations due to the sonar. Furthermore the ship had an increased ballast, lowered centre of gravity and an increased hull width what resulted in a ship having displacement roughly 1.5 times the one of its predecessor, the [[Type K-7 / No.4 Class|No.4-class]].
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Submarine chasers of the project number K8, also known as the No.13-class submarine chasers (第十三号型駆潜艇, Dai 13 Gō-gata Kusentei), were built under Maru 4 Keikaku programme, totalling 15 ships built from 1940 till 1942. The primary principle of the design was to build capable ships quickly and cheaply. The resulting design used cheaper, more common steel found on merchant ships, not military units. But an additional reinforcements created a notably sturdier hull, which also helped avoiding secondary vibrations due to the sonar. Furthermore, the ship had an increased ballast, lowered centre of gravity and an increased hull width what resulted in a ship having displacement roughly 1.5 times the one of its predecessor, the [[Type K-7 / No.4 Class|No.4-class]].
  
 
===Ships of class===
 
===Ships of class===
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| 1941-03-31
 
| 1941-03-31
 
| Survived
 
| Survived
|  
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|
|  
+
|
| 1948
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| 1948-04-23
 
|-
 
|-
 
| No. 16
 
| No. 16
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| Aircraft
 
| Aircraft
 
| 1944-07-04
 
| 1944-07-04
|  
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|
 
|-
 
|-
 
| No. 17
 
| No. 17
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| Submarine, USS Springer (SS-414)
 
| Submarine, USS Springer (SS-414)
 
| 1945-04-28
 
| 1945-04-28
|  
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|
 
|-
 
|-
 
| No. 18
 
| No. 18
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| Aircraft
 
| Aircraft
 
| 1944-12-30
 
| 1944-12-30
|  
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|
 
|-
 
|-
 
| No. 19
 
| No. 19
 
| 1941-09-20
 
| 1941-09-20
 
| Survived
 
| Survived
|  
+
|
|  
+
|
 
| 1948
 
| 1948
 
|-
 
|-
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| 1941-08-20
 
| 1941-08-20
 
| Survived
 
| Survived
|  
+
|
|  
+
|
| 1948
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| 1948-05-04
 
|-
 
|-
 
| No. 21
 
| No. 21
 
| 1941-08-20
 
| 1941-08-20
 
| Survived
 
| Survived
|  
+
|
|  
+
|
 
| 1947
 
| 1947
 
|-
 
|-
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| Aircraft
 
| Aircraft
 
| 1944-02-19
 
| 1944-02-19
|  
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|
 
|-
 
|-
 
| No. 23
 
| No. 23
 
| 1941-11-15
 
| 1941-11-15
 
| Survived
 
| Survived
|  
+
|
|  
+
|
 
| 1948
 
| 1948
 
|-
 
|-
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| Destroyer, USS Burns (DD-588)
 
| Destroyer, USS Burns (DD-588)
 
| 1944-02-17
 
| 1944-02-17
|  
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|
 
|-
 
|-
 
| No. 25
 
| No. 25
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| Submarine, USS Grunion (SS-216)
 
| Submarine, USS Grunion (SS-216)
 
| 1942-07-15
 
| 1942-07-15
|
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|
 
|-
 
|-
 
| No. 26
 
| No. 26
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| Aircraft
 
| Aircraft
 
| 1945-07-30
 
| 1945-07-30
|
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|
 
|-
 
|-
 
| No. 27
 
| No. 27
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| Submarine, USS Grunion
 
| Submarine, USS Grunion
 
| 1942-07-16
 
| 1942-07-16
|
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|
 
|}
 
|}
  
One interesting fact is that the No. 27 was the last victim of the USS Grunion, before it sunk 4 days later.
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''No. 13'' and ''No. 13'' took part in a hunt for USS Nautilus (SS-168) in June 1942, damaging the submarine with depth charges and forcing it back to Pearl Harbor for month-long repairs. The ''No. 27'' was likely the last victim of the USS Grunion, before the latter was sunk 4 days later. ''No. 18'' sunk USS Amberjack (SS-219) on 16 February 1943. In October 1943, ''No. 15'' took part in the sinking of submarine USS Wahoo (SS-238). On 14 November 1943, the ''No. 20'' engaged in a gunnery duel with the HMS Taurus (P399), with the submarine hitting the bridge of the chaser with its QF 4-inch Mk IV (102 mm) gun, killing the captain and most of the crew onboard. The ship suffers a number of other hits that eventually flood her engine room forcing the ship to be towed back into the port for repairs. The submarine returned back to the port undamaged, despite ''No. 20''<nowiki/>'s crew claiming a direct hull hit and dropping a number of depth charges.
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08 August 1945 marks the most successful anti-aircraft duty of the class, with the ''No. 19'' damaging six out of fourteen [[B-25 (Family)|B-25]] bombers trying to strafe it in the Tsushima Strait between Japan and South Korea. The ship suffered one bomb hit, but survives the encounter and returns back to the Kure port, about 20 km away from Hiroshima just days after the atomic bombing.
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 +
Ships of the class also participated in a number of rescue operations, such as ''No. 17'' and ''No. 18'' rescuing of nearly 400 survivors of the bombing of a Naples Maru troop transport or No. 20 rescuing 622 survivors after an attack on a convoy departing from the Musa Bay in the September 1944.
  
 
===22-GO Radar===
 
===22-GO Radar===
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It was designed as a search radar. First test phase was done onboard battleship Hyūga in May 1942, with further testing proceeding onboard Yamato in July 1943. It went through a number of updates, eventually reaching nearly 1000 units produced by the end of the war. The mass deployment begin in July 1944, eventually reaching most of the Japanese naval units. After the war, radars found their use onboard whaling vessels helping to mitigate the food shortage in the post-war period by ensuring a safe passage of the vessels between the icebergs in the northern seas.
 
It was designed as a search radar. First test phase was done onboard battleship Hyūga in May 1942, with further testing proceeding onboard Yamato in July 1943. It went through a number of updates, eventually reaching nearly 1000 units produced by the end of the war. The mass deployment begin in July 1944, eventually reaching most of the Japanese naval units. After the war, radars found their use onboard whaling vessels helping to mitigate the food shortage in the post-war period by ensuring a safe passage of the vessels between the icebergs in the northern seas.
  
Radar suffered from relatively low accuracy, making it not suitable for fire-control applications. It had an average range error of 160 m and an average bearing error of 2.26°. It was able to detect battleships at 35 km range, destroyers at 16 km and submarines at 5 km. Testing onboard Yamato also proved that the radar can detect a water column from Yamato's 155 mm secondary cannons from up to 15 km.
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The radar suffered from relatively low accuracy, making it not suitable for fire-control applications. It had an average range error of 160 metres and an average bearing error of 2.26°. It was able to detect battleships at 35 km range, destroyers at 16 km and submarines at 5 km. Testing onboard Yamato also proved that the radar can detect a water column from Yamato's 155 mm secondary cannons from up to 15 km.
  
 
{{Clear|left}}
 
{{Clear|left}}
  
 
== Media ==
 
== Media ==
<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.''-->
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<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
<gallery>
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<gallery mode="packed" heights="200">
 
File:GarageImage Type K-8 Front Day Operation FROST.jpg|Front profile in the Operation FROST garage
 
File:GarageImage Type K-8 Front Day Operation FROST.jpg|Front profile in the Operation FROST garage
 
File:GarageImage Type K-8 Rear Day Operation FROST.jpg|Rear profile in the Operation FROST garage
 
File:GarageImage Type K-8 Rear Day Operation FROST.jpg|Rear profile in the Operation FROST garage
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== See also ==
 
== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
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<!-- ''Links to articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 
* ''reference to the series of the ship;''
 
* ''reference to the series of the ship;''
* ''links to approximate analogues of other nations and research trees.''
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* ''links to approximate analogues of other nations and research trees.'' -->
 +
Ships of comparable role, configuration and era
 +
 
 +
* [[Type K-7 / No.4 Class]] (predecessor)
 +
* [[Pr.191M]] (comparable USSR armored gun boat)
  
 
== External links ==
 
== External links ==
<!--''Paste links to sources and external resources, such as:''
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<!-- ''Paste links to sources and external resources, such as:''
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
 
* ''encyclopedia page on the ship;''
 
* ''encyclopedia page on the ship;''
* ''other literature.''-->
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* ''other literature.'' -->
* [https://en.wikipedia.org/wiki/No.13-class_submarine_chaser <nowiki>[Wikipedia]</nowiki> No.13-class submarine chaser]
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 +
* [[wikipedia:No.13-class_submarine_chaser|[Wikipedia] No.13-class submarine chaser]]
  
 
{{Japan sub-chasers}}
 
{{Japan sub-chasers}}

Latest revision as of 07:29, 3 June 2021

Rank 4 USA
USS Helena Pack
Type K-8 No.13 late
jp_kusen_tei_13_1944.png
GarageImage Type K-8 No.13 late.jpg
Type K-8 No.13 late
Research:18 000 Specs-Card-Exp.png
Purchase:77 000 Specs-Card-Lion.png
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Description

The Type K-8 No.13, Kusentei late modification is a rank III Japanese sub-chaser with a battle rating of 2.3 (AB/RB/SB). It was introduced in Update 1.89 "Imperial Navy".

General info

Survivability and armour

Armourfront / side / back
Hull6 mm (steel)
Superstructure4 mm (steel)
Number of section7
Displacement420 t
Crew80 people
Type K-8 can survive a few ships simultaneously creating a spectacle with all the shrapnel flying off.

The Type K-8 No.13, Kusentei late modification's primary characteristic is her exceptional survivability for the battle rating. With a crew count of 80, she's got nearly the double of the second-best vessel, and nearly 7 times the crew count of any US vessel in this battle rating. She's also the only ship within the battle rating to have 7 hull sections, at least one more than all the other ships. Overall this gives her an outstanding ability to survive even a focused gun fire from multiple boats.

That said though - the Type K-8 No.13 late has some weak points to her survivability. First of all, she has one of the thinnest armour layers, making it impossible to deflect even the lowest calibre guns at nearly any range. Secondly her primary gun is fully exposed, leading to it being often disabled under enemy fire. And lastly her ammunition storage is exposed fully over the water level, directly under the primary gun, making for a significant chances of ammo-racking the ship.

Mobility

Speedforward / back
AB45 / 16 km/h
RB30 / 11 km/h

With the top speed of 33km/h, she's a relatively large, lumbering target. It's not helped by an average rudder turning speed of 4.85s. Overall it's an attractive target for a torpedo attacks and a long-range gunnery fire.

Mobility Characteristics
Game Mode Upgrade Status Maximum Speed (km/h) Turn Time (s) Turn Radius (m)
Forward Reverse
AB Stock ___ ___
Upgraded 45 16
RB/SB Stock ___ ___
Upgraded 30 11

Modifications and economy

Repair costBasic → Reference
AB2 380 → 3 053 Sl icon.png
RB2 520 → 3 233 Sl icon.png
Total cost of modifications19 610 Rp icon.png
44 000 Sl icon.png
Talisman cost980 Ge icon.png
Crew training22 000 Sl icon.png
Experts77 000 Sl icon.png
Aces400 Ge icon.png
Research Aces280 000 Rp icon.png
Reward for battleAB / RB / SB
90 / 100 / 100 % Sl icon.png
136 / 136 / 136 % Rp icon.png
Modifications
Seakeeping Unsinkability Firepower
Mods new ship hull.png
Dry-Docking
Research:
990 Rp icon.png
Cost:
2 200 Sl icon.png
130 Ge icon.png
Mods new ship rudder.png
Rudder Replacement
Research:
890 Rp icon.png
Cost:
2 000 Sl icon.png
120 Ge icon.png
Mods new ship screw.png
Propeller Replacement
Research:
1 200 Rp icon.png
Cost:
2 700 Sl icon.png
160 Ge icon.png
Mods new ship engine.png
Engine Maintenance
Research:
1 600 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png
Mods ship tool kit.png
Tool Set
Research:
990 Rp icon.png
Cost:
2 200 Sl icon.png
130 Ge icon.png
Mods manual ship extinguisher.png
Fire Protection System
Research:
890 Rp icon.png
Cost:
2 000 Sl icon.png
120 Ge icon.png
Mods engine smoke screen system.png
Smokescreen
Research:
890 Rp icon.png
Cost:
2 000 Sl icon.png
120 Ge icon.png
Mods new ship pumps.png
New Pumps
Research:
1 600 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png
Mods tank ammo.png
25mm_type96_naval_ap_ammo_pack
Research:
990 Rp icon.png
Cost:
2 200 Sl icon.png
130 Ge icon.png
Mods new aa caliber turrets.png
Anti-Air Armament Targeting
Research:
990 Rp icon.png
Cost:
2 200 Sl icon.png
130 Ge icon.png
Mod arrow 0.png
Mods tank ammo.png
25mm_type96_naval_incendiary_ammo_pack
Research:
890 Rp icon.png
Cost:
2 000 Sl icon.png
120 Ge icon.png
Mods new aux caliber turrets.png
Auxiliary Armament Targeting
Research:
890 Rp icon.png
Cost:
2 000 Sl icon.png
120 Ge icon.png
Mod arrow 0.png
Mods ship rangefinder.png
Improved Rangefinder
Research:
1 200 Rp icon.png
Cost:
2 700 Sl icon.png
160 Ge icon.png
Mods new main caliber turrets.png
Primary Armament Targeting
Research:
1 200 Rp icon.png
Cost:
2 700 Sl icon.png
160 Ge icon.png
Mods depth charge.png
Depth Charges
Research:
1 200 Rp icon.png
Cost:
2 700 Sl icon.png
160 Ge icon.png
Mod arrow 0.png
Mods ship art support.png
Artillery Support
Research:
1 600 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png
Mods ship mortar.png
Bomb mortar
Research:
1 600 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png

Armament

Primary armament

Turret8 cm/40 Type 3 cannon
Ammunition400 rounds
Vertical guidance-7° / 75°
The Type 3 cannon firing a visible HE shell

The Type K-8 No.13 late's primary armament is a single 8 cm Type 3 cannon. It can fire up to 20 shots/minute of Type 0 HE shells that are relatively potent, with 480 g of TNT, being able to one-shot individual hull sections on most boats she'll encounter, but struggling with larger units like submarine chasers.

The gun was originally designed as a high-elevation one, historically being often mounted on a larger ships for anti-aircraft duty. As a result, her horizontal guidance is ±180° and vertical -7°/+75°, covering most of the field around the ship with exception of the deadzone behind the conning tower, although the gun can still engage airborne targets by firing above it. Targetting speed is slow, just 9.4°/s, however it's sufficient to engage targets bar fast attack boats in an extremely short range where machine guns engage them anyway.

Secondary armament

3 х Turret25 mm/60 Type 96 automatic cannon
Ammunition1500 rounds
Belt capacity15 rounds
Fire rate261 shots/min
Two Type 96 automatic cannons on a platform have a wide firing arcs, being able to effectively engage most targets

Same as the predecessors Type K-3 and Type K-7, this boat is equipped with three single mounting 25 mm Type 96 autocannons, which make for a very potent secondary weapons. The HE type rounds this gun fires have no trouble knocking out PT boats and even larger support vessels, sometimes even with one magazine all together. Alternatively, AP racks can be used for handling armoured boats with a penetration of up to 37mm at 1000m range, which is more than enough to penetrate even hardened armor gun shield of German boats.

Two of the cannons are placed on a platform in front of the smoke funnel, while the third one is located right behind the primary cannon, in a super-firing position. Additionally due to the HE these cannons can engage targets at range and still do damage. This cannon can also cause critical damage to aircraft with only a single hit.

  • Universal belts: good balance between firepower and tracer contents, useful for newcomers to the Japanese 25 mm autocannon.
  • APT belts: Full of AP shells, it's recommended to take a few belts of AP in case you meet a Russian armoured river boat.
  • HEI belts: Trades tracer rounds for extra firepower, they're more efficient than Universal belts at knocking out PT boats and aircraft at the expense of price. Universal belts are free, while APT and HEI belts cost 5 Sl icon.png each.

Note that the autocannon in a front mount has significantly decreased guidance arc. While for the two guns on the platform amidship have horizontal guidance of ±180°, the front one has only -90°/+40°, which means that the guns have a relatively narrow arc where majority of the secondary guns can fire.

Anti-aircraft armament

Turret2 x 13.2 mm Type 93 machine gun
Ammunition3600 rounds
Belt capacity30 rounds
Fire rate476 shots/min
Low-mounted dual Type 93 is relatively accurate and covers the entirety of the rear of the ship
Main article: Type 93 (13.2 mm)

Unlike predecessors, this boat have separate anti-aircraft armament which consists from twin Type 93 (13.2 mm) machine guns on a single mount at the rear of the ship. It has a notable advantage in vertical guidance over the Type 96 automatic cannons, being able to aim at targets up to +80° vs +65° for the Type 96. Also having nearly double the fire rate further increases its chances of landing successful shots at the enemy. That said though, even with two bullets hitting the enemy, the overall damage is much lower, with 13.2 mm HEI bullet bearing 1g TNT, while 25mm HEI bears 15.3g TNT.

Additional armament

Setup 114 x Type 95 depth charge
Setup 216 x Type 95 depth charge
Setup 316 x Type 95 depth charge
14 x Type 95 depth charge
Main article: Type 95 depth charge

Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.

Usage in battles

The primary role of the Type K-8 is to lure enemy's attention away from more vulnerable targets. Being large, intimidating ship it will often be under fire of a number of enemy units. And often times it can freely survive those engagements, largely thanks to its 8cm main gun packing powerful punch, although delivered at a low fire rate, and assisted by a number of secondaries at all angles.

Pros and cons

Pros:

  • Excellent survivability
  • Good armament
  • 360° weapon coverage
  • Good anti-aircraft capability
  • Main gun able to engage aircraft

Cons:

  • Subchaser
    • Slow speed and low manoeuvrability
    • Large target

History

Submarine chasers of the project number K8, also known as the No.13-class submarine chasers (第十三号型駆潜艇, Dai 13 Gō-gata Kusentei), were built under Maru 4 Keikaku programme, totalling 15 ships built from 1940 till 1942. The primary principle of the design was to build capable ships quickly and cheaply. The resulting design used cheaper, more common steel found on merchant ships, not military units. But an additional reinforcements created a notably sturdier hull, which also helped avoiding secondary vibrations due to the sonar. Furthermore, the ship had an increased ballast, lowered centre of gravity and an increased hull width what resulted in a ship having displacement roughly 1.5 times the one of its predecessor, the No.4-class.

Ships of class

Name Completed Fate at the end of the war Dismantled
post-war
Status By Date
No. 13 1940-07-15 Sunk Submarine, USS Pickerel (SS-177) 1943-04-03
No. 14 1941-03-31 Destroyed Aircraft 1945-07-28
No. 15 1941-03-31 Survived 1948-04-23
No. 16 1941-04-05 Sunk Aircraft 1944-07-04
No. 17 1941-07-31 Sunk Submarine, USS Springer (SS-414) 1945-04-28
No. 18 1941-07-31 Sunk Aircraft 1944-12-30
No. 19 1941-09-20 Survived 1948
No. 20 1941-08-20 Survived 1948-05-04
No. 21 1941-08-20 Survived 1947
No. 22 1941-10-12 Sunk Aircraft 1944-02-19
No. 23 1941-11-15 Survived 1948
No. 24 1941-12-20 Sunk Destroyer, USS Burns (DD-588) 1944-02-17
No. 25 1941-12-29 Sunk Submarine, USS Grunion (SS-216) 1942-07-15
No. 26 1941-12-20 Sunk Aircraft 1945-07-30
No. 27 1942-01-28 Sunk Submarine, USS Grunion 1942-07-16

No. 13 and No. 13 took part in a hunt for USS Nautilus (SS-168) in June 1942, damaging the submarine with depth charges and forcing it back to Pearl Harbor for month-long repairs. The No. 27 was likely the last victim of the USS Grunion, before the latter was sunk 4 days later. No. 18 sunk USS Amberjack (SS-219) on 16 February 1943. In October 1943, No. 15 took part in the sinking of submarine USS Wahoo (SS-238). On 14 November 1943, the No. 20 engaged in a gunnery duel with the HMS Taurus (P399), with the submarine hitting the bridge of the chaser with its QF 4-inch Mk IV (102 mm) gun, killing the captain and most of the crew onboard. The ship suffers a number of other hits that eventually flood her engine room forcing the ship to be towed back into the port for repairs. The submarine returned back to the port undamaged, despite No. 20's crew claiming a direct hull hit and dropping a number of depth charges.

08 August 1945 marks the most successful anti-aircraft duty of the class, with the No. 19 damaging six out of fourteen B-25 bombers trying to strafe it in the Tsushima Strait between Japan and South Korea. The ship suffered one bomb hit, but survives the encounter and returns back to the Kure port, about 20 km away from Hiroshima just days after the atomic bombing.

Ships of the class also participated in a number of rescue operations, such as No. 17 and No. 18 rescuing of nearly 400 survivors of the bombing of a Naples Maru troop transport or No. 20 rescuing 622 survivors after an attack on a convoy departing from the Musa Bay in the September 1944.

22-GO Radar

Two rotating antennas of the 22-GO radar

The two rotating devices on top of the conning tower of the Type K-8 are not acoustic listening devices, but rather a radar. Each of the two devices are built of a dipole antenna inside a large, cone-like horn antenna. Its designation is 22-GO (22号電探), also known as Navy Mark 2 Type 2 Radar. Colloquially it was called "Horns" among Americans and "Tuna" among Japanese sailors.

It was designed as a search radar. First test phase was done onboard battleship Hyūga in May 1942, with further testing proceeding onboard Yamato in July 1943. It went through a number of updates, eventually reaching nearly 1000 units produced by the end of the war. The mass deployment begin in July 1944, eventually reaching most of the Japanese naval units. After the war, radars found their use onboard whaling vessels helping to mitigate the food shortage in the post-war period by ensuring a safe passage of the vessels between the icebergs in the northern seas.

The radar suffered from relatively low accuracy, making it not suitable for fire-control applications. It had an average range error of 160 metres and an average bearing error of 2.26°. It was able to detect battleships at 35 km range, destroyers at 16 km and submarines at 5 km. Testing onboard Yamato also proved that the radar can detect a water column from Yamato's 155 mm secondary cannons from up to 15 km.

Media

See also

Ships of comparable role, configuration and era

External links


Japan sub-chasers
Type 5 · Type K-3 No.1 · Type K-7 No.4 · Type K-8 No.13 · Type K-8 No.13 late