Difference between revisions of "MO-4"

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{{Specs-Card|code=ussr_mo_4}}
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{{Specs-Card
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|code=ussr_mo_4
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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 understand which ship is being discussed.''-->
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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.'' -->
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[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
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The '''MO-4''' is a small submarine hunter built by the Soviet navy during WW2. It was the fourth development of the MO class, and around 250 vessels were built during the war. The MO-4 saw extensive duty during WW2, performing various roles such as anti-submarine operations, convoy escort, as well as supporting landing operations. The further development of the MO class led to the creation of the [[BMO]] class, with 66 vessels being built in 1945.
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{{break}}
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The '''{{Specs|name}}''' is a rank {{Specs|rank}} Soviet sub-chaser {{Battle-rating|1}}. It was introduced during [[Update 1.79 "Project X"]] when the Soviet fleet was implemented into the game.
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This vessel was introduced during [[Update 1.79 "Project X"]] when the Soviet fleet was implemented into the game. It is equipped with two 45 mm cannons and two 12.7 mm DShK machine guns, which are effective for destroying enemy boats and lightly armoured targets. It can also be equipped with 64 M-8 rockets, which are powerful enough to destroy anything at close range, regardless of whether the enemy is armoured or not. Additionally, you can equip it with BB-1 depth charges to deter or destroy enemy vessels attempting to approach from behind.
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and armour ===
−
''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. Tips for preserving survivability should be saved for the "Use in battle" section.''
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{{Specs-Fleet-Armour}}
 +
<!-- ''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.'' -->
 +
MO-4 has the following structural layout:
  
−
''If necessary, use a graphic template to show the most well-protected or most vulnerable points in the armour.''
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* Hull: 38 mm, wood
 +
* Superstructure: 10 mm, wood
 +
 
 +
The {{PAGENAME}} is not armoured at all, and can be easily destroyed by even a rank 1 ship at close range. Ammo stores lay in the front and rear of the ship, while the fuel tanks are in the centre, meaning that an enemy shot will have a good chance of hitting a critical component. The silver lining of the {{PAGENAME}}'s survivability is that the engines are below the water line, and so they are somewhat harder to hit.
  
 
=== Mobility ===
 
=== Mobility ===
−
''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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{{Specs-Fleet-Mobility}}
 +
<!-- ''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.'' -->
 +
 
 +
{{NavalMobility
 +
|SpeedForwardStockAB = 49
 +
|SpeedBackStockAB = 19
 +
|SpeedForwardStockRB = 43
 +
|SpeedBackStockRB = 17
 +
}}
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 +
The MO-4 is relatively mobile for a ship of its size, with a top speed of 50 km/h in RB and 67 km/h in AB. While this is far slower than the MTBs at the same BR, it is quite adequate for a ship of its size, and is enough to get the MO-4 where it needs to be. Furthermore, the MO-4 is relatively snappy in terms of controls and turns relatively quickly, meaning that it is overall quite nimble.
 +
 
 +
=== Modifications and economy ===
 +
{{Specs-Economy}}
  
 
== Armament ==
 
== Armament ==
 +
{{Specs-Fleet-Armaments}}
 
=== Primary armament ===
 
=== Primary armament ===
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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>.''
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{{Specs-Fleet-Primary}}
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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.'' -->
 +
{{main|45 mm/68 21-KM (45 mm)}}
 +
 
 +
This ship has access to two manual 45 mm cannons that can use AP ammo (for use against armoured boats) and three types of HE ammo. The default one and one of the unlockable ones (OR-73A and F-73 respectively) can be used to hit distant targets due to their greater muzzle velocity. The O-240 HE shell has greater explosive filler, but lower muzzle velocity, and so is more effective at closer range.
  
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''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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However, these guns leave the crew exposed due to the lack of armour, so even enemy machine guns can incapacitate these guns. As such, try to stay at range to prevent this from happening.
 +
 
 +
{{:45 mm/68 21-KM (45 mm)/Ammunition|45 mm OR-73A HET, 45 mm O-240 HE, 45 mm BR-240, 45 mm F-73}}
  
 
=== Secondary armament ===
 
=== Secondary armament ===
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''Some ships are fitted with weapons of various calibres. Secondary armament is defined by 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.'' -->
 +
{{main|DShK (12.7 mm)}}
  
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''If there is no secondary armament, remove this section.''
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The anti-air armaments of the {{PAGENAME}} consist of a total of two 12.7 mm DShK machine guns. These guns should be primarily against the aircraft, which are relatively easy to take down at BR 1.7, but they can also be used against the lightly-armoured boats that are still present at this battle rating (such as the LS 3). The guns are positioned in the middle section of the ship, which should pose no problems against aircraft because at least one gun can be placed onto the enemy aircraft, but it can be hard to attack boats directly in front of the ship.
  
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=== Anti-aircraft armament ===
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* '''Universal:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|API-T|Armour-piercing incendiary tracer}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}
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''An important part of the ship’s armament responsible for air raid defense. 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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* '''12.7 mm HE belts:''' {{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|API-T|Armour-piercing incendiary tracer}}
 +
* '''12.7 mm APIT belts:''' {{Annotation|API-T|Armour-piercing incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
  
−
''If there is no anti-aircraft artillery, remove this section.''
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{{:DShK (12.7 mm)/Ammunition|AP-I naval, API-T naval, IAI naval}}
  
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=== Torpedo armament ===
+
=== Additional armament ===
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''Many ships are armed with torpedo launchers, and for some vessels such as boats, torpedoes are an extremely important means of defeating an opponent. Evaluate the position of the torpedo launchers, discuss the ammunition available, firing specifics such as dead zones, features of the torpedoes themselves, etc.''
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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.'' -->
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{{main|BB-1 depth charge|M-8}}
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 +
One big firepower improvement on the {{PAGENAME}} is the ability to equip the M-8 rockets. With a total of 64 rockets (32 on the deck ready to use), this ship can destroy almost anything, armoured or not, at very close range. While this ship should not be used at close range due to the lack of protection, rockets can be used in a last ditch effort to defeat rushing enemies or if in need of a quick-reacting weapon to surprise-attack someone. Do not underestimate the psychological effect of the rockets on newer player that may try to run away, seeing/hearing them.
 +
 
 +
== 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).'' -->
  
−
''If there is no torpedo armament, remove this section.''
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The {{PAGENAME}} has dangerous long-range firepower at a very low battle rating, but limited defence against fast and evasive enemies and air power. Accordingly, the MO-4 should fight conservatively at the longest possible range the crew's gunnery skill could reach. At this battle rating, very few opponents will have large-calibre guns that can compete at range, and even fewer players will be able to target them effectively, so use that to the ship's advantage.
  
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=== Special armament ===
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The MO-4 has two 45 mm cannons, with one on the bow and one on the stern. These weapons are not fully automatic, but pack a very significant punch for the battle rating. Indeed, they are very capable of ripping apart any vessels at the MO-4's BR, from larger patrol ships to smaller MTBs. Note that these weapons have a longer effective range than most other weapons that the MO-4 commonly faces, meaning that the ship can be used in a "sniper" playstyle. This means that the ship should stay 2-3 km away from any enemies, and snipe enemy light vessels using its powerful armament. This way, the MO-4 can make good use of its powerful armament without being heavily damaged by enemy vessels.
−
''Depth charges, mines, rocket launchers and missiles are also effective in skilled hands and can be an unexpected surprise for an opponent. Evaluate the ammunition of this type of armament and rate its performance in combat.''
 
  
−
== Usage in battles ==
+
Since the MO-4 does not have good anti-air defence, with only two 12.7 mm DShK machine guns for the job, it should be used as a first spawn ship; otherwise stay close to allies with good anti-air defences to extend its lifespan. The two DShK machine guns aren't good at longer ranges due to their short effective range (~1.5 km) but are highly effective against enemy vessels at short ranges. These weapons can put out a decent amount of damage when used correctly. Finally, note that the MO-4 gets access to M-8 unguided rockets. These weapons aren't effective against fast light vessels, but are highly effective against larger, slower vessels. Feel free to use these weapons when necessary, especially if being overwhelmed at closer ranges. The rockets pack a massive punch and will easily destroy any ships the MO-4 faces.
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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 get 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).''
 
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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''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 - they have a substitution in the form of softer "inadequate", "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:'''
−
*
+
 
 +
* Two large 45 mm cannons on the bow and stern of the ship
 +
* Two secondary 12.7 mm DShK machine guns possess a good field of range, provide some air cover
 +
* Four rocket pods on the bow of the ship deal huge damage up close and swivel to allow rockets to be fired in all directions except directly backward
  
 
'''Cons:'''
 
'''Cons:'''
−
*
+
 
 +
* Primary cannons have a low rate of fire
 +
* Turrets have low turning speed
 +
* Crew are incapacitated very easily due to lack of armour
 +
* Good speed requires the purchase of all sea keeping modules
 +
* Wooden hull can easily catch on fire
  
 
== 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 big, take it to a separate article, taking a link to an 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.''
+
<!-- ''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).'' -->
 +
The MO-4 (Russian: Малый Охотник, Malyj Okhotnik, English: Small Hunter) was a class of small submarine chasers built by the Soviet navy during the Second World War. The ships were designed for anti-submarine warfare as well as coastal patrol, though their duties varied during the course of the Second World War. The MO-4 class was the most numerous variant of the basic MO design, with approximately 250 ships built. The ships were built between 1937 and 1943, and served extensively during the Second World War.
 +
 
 +
The MO-4 was the 4th development of the MO class of guard ships, following the MO-1, MO-2 and MO-3 classes. However, in terms of production size, it dwarfed the previous classes, with roughly 250 ships produced compared to roughly 40 ships of the previous three classes. The MO-4s sported a main armament of two 45 mm 21-K cannons, one each mounted fore and aft of the bridge. As well, the ship carried two single DShK heavy machine guns. The MO-4 class sub-chasers were not fitted with torpedo armament, but rather, depth charges for it's anti-submarine role.
 +
 
 +
The MO-4 class of sub chasers saw extensive duty during the Second World War, not only in its anti-submarine role, but in various other roles as well. The ships were designed to be small and versatile, and as such, they were used for a variety of purposes including convoy escort and landing support. Two MO type sub chasers (MO-103 and MO-144) sank one U-Boat each, while other MO-4 boats destroyed small surface ships and aircraft. The MO-4 class would also lend its design to the later BMO (the B standing for "armoured"), of which 66 were produced in 1945.
  
 
== Media ==
 
== Media ==
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''An excellent addition to the article will be video guides, as well as 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.'' -->
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 +
;Skins
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 +
* [https://live.warthunder.com/feed/camouflages/?vehicle=ussr_mo_4 Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]
 +
 
 +
;Videos
 +
{{Youtube-gallery|ty5x8xhle84|'''The Shooting Range #295''' - ''Pages of History'' section at 04:15 discusses SKA-65.|80ajQCMfdto|'''The Shooting Range #112''' - ''Pages of History'' section at 09:36 discusses the MO-4.}}
  
 
== See also ==
 
== See also ==
−
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
+
''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.''
 
* ''links to approximate analogues of other nations and research trees.''
  
 
== External links ==
 
== External links ==
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''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;''
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* ''encyclopedia page on ship;''
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* ''other literature.'' -->
−
* ''other literature.''
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 +
* [[wikipedia:MO-class_small_guard_ship|[Wikipedia] MO-class small guard ship]]
  
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{{USSR sub-chasers}}
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{{USSR boats}}

Latest revision as of 07:46, 25 October 2023

Rank VI USSR | Premium | Golden Eagles
Su-25K Pack
MO-4
ussr_mo_4.png
GarageImage MO-4.jpg
MO-4
USSR flag.png USSR
I Rank
Battle rating:
AB RB SB
1.0 1.0 1.0
Class:
Research:2 900 Specs-Card-Exp.png
Purchase:700 Specs-Card-Lion.png
Show in game

Description

The MO-4 is a small submarine hunter built by the Soviet navy during WW2. It was the fourth development of the MO class, and around 250 vessels were built during the war. The MO-4 saw extensive duty during WW2, performing various roles such as anti-submarine operations, convoy escort, as well as supporting landing operations. The further development of the MO class led to the creation of the BMO class, with 66 vessels being built in 1945.

This vessel was introduced during Update 1.79 "Project X" when the Soviet fleet was implemented into the game. It is equipped with two 45 mm cannons and two 12.7 mm DShK machine guns, which are effective for destroying enemy boats and lightly armoured targets. It can also be equipped with 64 M-8 rockets, which are powerful enough to destroy anything at close range, regardless of whether the enemy is armoured or not. Additionally, you can equip it with BB-1 depth charges to deter or destroy enemy vessels attempting to approach from behind.

General info

Survivability and armour

Armourfront / side / back
Hull38 mm (wood)
Superstructure10 mm (wood)
Number of section4
Displacement52 t
Crew22 people

MO-4 has the following structural layout:

  • Hull: 38 mm, wood
  • Superstructure: 10 mm, wood

The MO-4 is not armoured at all, and can be easily destroyed by even a rank 1 ship at close range. Ammo stores lay in the front and rear of the ship, while the fuel tanks are in the centre, meaning that an enemy shot will have a good chance of hitting a critical component. The silver lining of the MO-4's survivability is that the engines are below the water line, and so they are somewhat harder to hit.

Mobility

Speedforward / back
AB67 / 26 km/h
RB50 / 19 km/h
Mobility Characteristics
Game Mode Upgrade Status Maximum Speed (km/h) Turn Time (s) Turn Radius (m)
Forward Reverse
AB Stock 49 19
Upgraded 67 26
RB/SB Stock 43 17
Upgraded 50 19

The MO-4 is relatively mobile for a ship of its size, with a top speed of 50 km/h in RB and 67 km/h in AB. While this is far slower than the MTBs at the same BR, it is quite adequate for a ship of its size, and is enough to get the MO-4 where it needs to be. Furthermore, the MO-4 is relatively snappy in terms of controls and turns relatively quickly, meaning that it is overall quite nimble.

Modifications and economy

Repair costBasic → Reference
AB97 → 122 Sl icon.png
RB153 → 192 Sl icon.png
Total cost of modifications3 170 Rp icon.png
970 Sl icon.png
Talisman cost190 Ge icon.png
Crew training200 Sl icon.png
Experts1 000 Sl icon.png
Aces20 Ge icon.png
Research Aces96 000 Rp icon.png
Reward for battleAB / RB / SB
20 / 20 / 100 % Sl icon.png
100 / 100 / 100 % Rp icon.png
Modifications
Seakeeping Unsinkability Firepower
Mods new ship hull.png
Dry-Docking
Research:
150 Rp icon.png
Cost:
45 Sl icon.png
55 Ge icon.png
Mods new ship rudder.png
Rudder Replacement
Research:
110 Rp icon.png
Cost:
35 Sl icon.png
40 Ge icon.png
Mods new ship screw.png
Propeller Replacement
Research:
185 Rp icon.png
Cost:
55 Sl icon.png
70 Ge icon.png
Mods new ship engine.png
Engine Maintenance
Research:
195 Rp icon.png
Cost:
60 Sl icon.png
70 Ge icon.png
Mods ship damage control crew.png
Damage Control Division
Research:
150 Rp icon.png
Cost:
45 Sl icon.png
55 Ge icon.png
Mods ship fire control crew.png
Fire Division
Research:
110 Rp icon.png
Cost:
35 Sl icon.png
40 Ge icon.png
Mods engine smoke screen system.png
Smokescreen
Research:
110 Rp icon.png
Cost:
35 Sl icon.png
40 Ge icon.png
Mods new ship pumps.png
New Pumps
Research:
195 Rp icon.png
Cost:
60 Sl icon.png
70 Ge icon.png
Mods tank ammo.png
45mm_ussr_21k_o240_naval_he_ammo_pack
Research:
150 Rp icon.png
Cost:
45 Sl icon.png
55 Ge icon.png
Mods tank ammo.png
12mm_dshk_navy_he_ammo_pack
Research:
150 Rp icon.png
Cost:
45 Sl icon.png
55 Ge icon.png
Mods new aux caliber turrets.png
Auxiliary Armament Targeting
Research:
110 Rp icon.png
Cost:
35 Sl icon.png
40 Ge icon.png
Mods tank ammo.png
45mm_ussr_21k_naval_ap_ammo_pack
Research:
110 Rp icon.png
Cost:
35 Sl icon.png
40 Ge icon.png
Mods tank ammo.png
12mm_dshk_navy_ap_ammo_pack
Research:
110 Rp icon.png
Cost:
35 Sl icon.png
40 Ge icon.png
Mods new main caliber turrets.png
Primary Armament Targeting
Research:
185 Rp icon.png
Cost:
55 Sl icon.png
70 Ge icon.png
Mods ship rangefinder.png
Improved Rangefinder
Research:
185 Rp icon.png
Cost:
55 Sl icon.png
70 Ge icon.png
Mods depth charge.png
Depth Charges
Research:
185 Rp icon.png
Cost:
55 Sl icon.png
70 Ge icon.png
Mod arrow 0.png
Mods he frag base fuse tank.png
45mm_ussr_21k_naval_base_fuse_he_ammo_pack
Research:
195 Rp icon.png
Cost:
60 Sl icon.png
70 Ge icon.png
Mods rocket launcher.png
Rocket Launcher
Research:
195 Rp icon.png
Cost:
60 Sl icon.png
70 Ge icon.png
Mods rocket launcher.png
Rocket Launcher
Research:
195 Rp icon.png
Cost:
60 Sl icon.png
70 Ge icon.png
Mods ship art support.png
Artillery Support
Research:
195 Rp icon.png
Cost:
60 Sl icon.png
70 Ge icon.png

Armament

Primary armament

2 х Turret45 mm/68 21-KM cannon
Ammunition500 rounds
Vertical guidance-7° / 85°
Main article: 45 mm/68 21-KM (45 mm)

This ship has access to two manual 45 mm cannons that can use AP ammo (for use against armoured boats) and three types of HE ammo. The default one and one of the unlockable ones (OR-73A and F-73 respectively) can be used to hit distant targets due to their greater muzzle velocity. The O-240 HE shell has greater explosive filler, but lower muzzle velocity, and so is more effective at closer range.

However, these guns leave the crew exposed due to the lack of armour, so even enemy machine guns can incapacitate these guns. As such, try to stay at range to prevent this from happening.

Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
100 m 1,000 m 2,000 m 3,000 m 4,000 m 5,000 m
OR-73A HET HE 3 3 3 3 3 3
O-240 HE HE 5 5 5 5 5 5
BR-240 APHE 86 62 44 31 22 16
F-73 HE 23 17 12 8 6 4
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (g) 		Ricochet
0% 50% 100%
OR-73A HET HE 835 1.41 0 0.1 56.98 79° 80° 81°
O-240 HE HE 343 2.14 0 0.1 181.72 79° 80° 81°
BR-240 APHE 835 1.42 1 m 1.5 27.72 47° 60° 65°
F-73 HE 835 1.41 0.015 s 0.1 113.96 79° 80° 81°

Secondary armament

2 х Turret12.7 mm DShK machine gun
Ammunition2000 rounds
Belt capacity50 rounds
Fire rate600 shots/min
Main article: DShK (12.7 mm)

The anti-air armaments of the MO-4 consist of a total of two 12.7 mm DShK machine guns. These guns should be primarily against the aircraft, which are relatively easy to take down at BR 1.7, but they can also be used against the lightly-armoured boats that are still present at this battle rating (such as the LS 3). The guns are positioned in the middle section of the ship, which should pose no problems against aircraft because at least one gun can be placed onto the enemy aircraft, but it can be hard to attack boats directly in front of the ship.

  • Universal: AP-I · API-T · IAI
  • 12.7 mm HE belts: IAI · IAI · IAI · API-T
  • 12.7 mm APIT belts: API-T · AP-I · IAI · AP-I

Penetration statistics
Ammunition Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
AP-I 30 29 25 21 18 15
API-T 29 28 24 20 17 14
IAI 3 2 2 2 2 2
Shell details
Ammunition Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(m) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (g) 		Ricochet
0% 50% 100%
AP-I 850 0.05 - - - 47° 56° 65°
API-T 850 0.05 - - - 47° 56° 65°
IAI 850 0.05 0 0.1 1.5 47° 56° 65°

Additional armament

Setup 18 x BB-1 depth charge
Setup 264 x 82 mm M-8 rocket
Setup 364 x 82 mm M-8 rocket
8 x BB-1 depth charge
Main articles: BB-1 depth charge, M-8

One big firepower improvement on the MO-4 is the ability to equip the M-8 rockets. With a total of 64 rockets (32 on the deck ready to use), this ship can destroy almost anything, armoured or not, at very close range. While this ship should not be used at close range due to the lack of protection, rockets can be used in a last ditch effort to defeat rushing enemies or if in need of a quick-reacting weapon to surprise-attack someone. Do not underestimate the psychological effect of the rockets on newer player that may try to run away, seeing/hearing them.

Usage in battles

The MO-4 has dangerous long-range firepower at a very low battle rating, but limited defence against fast and evasive enemies and air power. Accordingly, the MO-4 should fight conservatively at the longest possible range the crew's gunnery skill could reach. At this battle rating, very few opponents will have large-calibre guns that can compete at range, and even fewer players will be able to target them effectively, so use that to the ship's advantage.

The MO-4 has two 45 mm cannons, with one on the bow and one on the stern. These weapons are not fully automatic, but pack a very significant punch for the battle rating. Indeed, they are very capable of ripping apart any vessels at the MO-4's BR, from larger patrol ships to smaller MTBs. Note that these weapons have a longer effective range than most other weapons that the MO-4 commonly faces, meaning that the ship can be used in a "sniper" playstyle. This means that the ship should stay 2-3 km away from any enemies, and snipe enemy light vessels using its powerful armament. This way, the MO-4 can make good use of its powerful armament without being heavily damaged by enemy vessels.

Since the MO-4 does not have good anti-air defence, with only two 12.7 mm DShK machine guns for the job, it should be used as a first spawn ship; otherwise stay close to allies with good anti-air defences to extend its lifespan. The two DShK machine guns aren't good at longer ranges due to their short effective range (~1.5 km) but are highly effective against enemy vessels at short ranges. These weapons can put out a decent amount of damage when used correctly. Finally, note that the MO-4 gets access to M-8 unguided rockets. These weapons aren't effective against fast light vessels, but are highly effective against larger, slower vessels. Feel free to use these weapons when necessary, especially if being overwhelmed at closer ranges. The rockets pack a massive punch and will easily destroy any ships the MO-4 faces.

Pros and cons

Pros:

  • Two large 45 mm cannons on the bow and stern of the ship
  • Two secondary 12.7 mm DShK machine guns possess a good field of range, provide some air cover
  • Four rocket pods on the bow of the ship deal huge damage up close and swivel to allow rockets to be fired in all directions except directly backward

Cons:

  • Primary cannons have a low rate of fire
  • Turrets have low turning speed
  • Crew are incapacitated very easily due to lack of armour
  • Good speed requires the purchase of all sea keeping modules
  • Wooden hull can easily catch on fire

History

The MO-4 (Russian: Малый Охотник, Malyj Okhotnik, English: Small Hunter) was a class of small submarine chasers built by the Soviet navy during the Second World War. The ships were designed for anti-submarine warfare as well as coastal patrol, though their duties varied during the course of the Second World War. The MO-4 class was the most numerous variant of the basic MO design, with approximately 250 ships built. The ships were built between 1937 and 1943, and served extensively during the Second World War.

The MO-4 was the 4th development of the MO class of guard ships, following the MO-1, MO-2 and MO-3 classes. However, in terms of production size, it dwarfed the previous classes, with roughly 250 ships produced compared to roughly 40 ships of the previous three classes. The MO-4s sported a main armament of two 45 mm 21-K cannons, one each mounted fore and aft of the bridge. As well, the ship carried two single DShK heavy machine guns. The MO-4 class sub-chasers were not fitted with torpedo armament, but rather, depth charges for it's anti-submarine role.

The MO-4 class of sub chasers saw extensive duty during the Second World War, not only in its anti-submarine role, but in various other roles as well. The ships were designed to be small and versatile, and as such, they were used for a variety of purposes including convoy escort and landing support. Two MO type sub chasers (MO-103 and MO-144) sank one U-Boat each, while other MO-4 boats destroyed small surface ships and aircraft. The MO-4 class would also lend its design to the later BMO (the B standing for "armoured"), of which 66 were produced in 1945.

Media

Skins
Videos
The Shooting Range #295 - Pages of History section at 04:15 discusses SKA-65.
The Shooting Range #112 - Pages of History section at 09:36 discusses the MO-4.

See also

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;
  • links to approximate analogues of other nations and research trees.

External links


USSR boats
Motor torpedo boats  D-3 · G-5 · G-5 (ShVAK) · Pr.123-bis · Pr.123K (A-10bis) · Pr.123K · Pr.183
Motor gun boats  TKA-412 · MO-4 · OD-200 · Pr.253L · Pr.183 BM-21 · Ya-5M
Motor torpedo gun boats  Pr. 206 · Pr.206-M · MPK Pr.12412 · MPK Pr.12412P · MPK Pr.11451
Gunboats  Groza
Armoured gun boats  BMO · MBK-161 early · MBK-161 late · MBK pr.186 · MBK pr.186 (MK 85) · Pr.1124 early · Pr.1124 late · Pr.1124 MLRS
  Pr.191 · Pr.191M · Pr.1204 · Pr.1204 late

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