MTB-1 1 series

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Rank 4 Japan
IJN Mikuma Pack
This page is about the British motor torpedo boat MTB-1 1 series. For other versions, see MTB-1 (Family).
GarageImage MTB-1 1 series.jpg
MTB-1 1 series
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The MTB-1 1 series is a rank I British motor torpedo boat with a battle rating of 1.0 (AB/RB/SB). It was introduced in Update 1.83 "Masters of the Sea" as part of the British fleet closed beta test. With the split of the naval tech trees in Update "New Power", MTB-1 1 series was moved to the Coastal fleet tech tree where it is now the reserve vehicle.

Decently fast and manoeuvrable, MTB-1 1 series is the Reserve vehicle of the British Coastal fleet tech tree. It carries a pair of torpedoes and sports a large number of guns, eight 7.72 mm Lewis 1916 machineguns in total. However, each machinegun individually has a poor damage output and a low effective range, so combined with her low survivability, extra caution is needed to fully utilize MTB-1 1 series.

General info

Survivability and armour

Armourfront / side / back
Hull24 mm (wood)
Superstructure2 mm (steel)
Number of section3
Displacement22 t
Crew11 people

MTB-1 1 series has the following armour layout:

  • Hull: 24 mm, wood
  • Superstructure: 2 mm, steel

Any gun in the game will easily be able to penetrate the hull and superstructure at any practical range.

The hull is split into three sections. The first section starts at the bow and ends after the ammunition storage; the second ends just behind the bridge; and the third ends at the stern. MTB-1 1 series can be hull-broken by any round with a large enough diameter and explosive mass. In general, this is limited to HE rounds greater with a diameter greater than 4 inches (102 mm). At MTB-1 1 series' battle rating, there is only one gun capable of hull-breaking her:

MTB-1 1 series internals (starboard). Note the ammo storage between the bridge and the forward gun mount.

There is one ammunition storage that holds ammunition for both the fore and aft gun turrets. It is located directly behind the forward gun turret just above the waterline. Destroying it will instantly destroy the boat.

MTB-1 1 series has a crew complement of 11. With a stock crew, vehicle is knocked out when 7 crew are lost; with an aced crew, this is increased to 8.

Compared to other reserve coastal vessels, the crew complement is average. However, due to her gun placements and size, MTB-1 1 series cannot take advantage of her survivability nearly as well as some of the other reserves, making her one of the least survivable. When compared to non-reserve vessels, her survivability is rather poor.


Speedforward / back
AB86 / 43 km/h
RB61 / 31 km/h
Mobility Characteristics
Game Mode Upgrade Status Maximum Speed (km/h) Turn Time (s) Turn Radius (m)
Forward Reverse
AB Stock 63 32 ~18.64 ~35.43
Upgraded 86 43 ~12.67 ~22.41
RB/SB Stock 53 26 ~20.77 ~36.73
Upgraded 61 31 ~17.44 ~33.15

While her top speed is on the slower side compared to other motor torpedo boats, MTB-1 1 series' manoeuvrability is actually rather good. With a tight turning circle and a decent enough top speed, the mobility is suitable enough for most situations, although the lower top speed really hurts her potential for flanking on certain maps.

MTB-1 1 series has a displacement of 22.4 tons. Because of her small size and relatively low displacement, MTB-1 1 series can be an unstable firing platform in rough waters.

Modifications and economy

Repair cost
Total cost of modifications3 240 Rp icon.png
140 Sl icon.png
Talisman cost80 Ge icon.png
Crew trainingfree
Experts1 000 Sl icon.png
Aces10 Ge icon.png
Research Aces80 000 Rp icon.png
Reward for battleAB / RB / SB
20 / 30 / 100 % Sl icon.png
100 / 100 / 100 % Rp icon.png
Seakeeping Unsinkability Firepower
Mods new ship hull.png
450 Rp icon.png
20 Sl icon.png
50 Ge icon.png
Mods new ship rudder.png
Rudder Replacement
Mods new ship screw.png
Propeller Replacement
Mods new ship engine.png
Engine Maintenance
Mods ship tool kit.png
Tool Set
Mods manual ship extinguisher.png
Fire Protection System
Mods engine smoke screen system.png
360 Rp icon.png
20 Sl icon.png
40 Ge icon.png
Mods new ship pumps.png
New Pumps
Mods tank ammo.png
7.7 mm AP belt
450 Rp icon.png
20 Sl icon.png
50 Ge icon.png
Mods tank ammo.png
360 Rp icon.png
20 Sl icon.png
40 Ge icon.png
Mods new main caliber turrets.png
Primary Armament Targeting
Mods depth charge.png
Depth Charges
540 Rp icon.png
20 Sl icon.png
60 Ge icon.png
Mods ship art support.png
Artillery Support
540 Rp icon.png
20 Sl icon.png
60 Ge icon.png
Mods torpedo.png
Torpedo Mode
540 Rp icon.png
20 Sl icon.png
60 Ge icon.png

As a reserve vehicle, the following modifications are unlocked for free: Rudder Replacement, Propeller Replacement, Engine Maintenance, Tool Set, Fire Protection System, New Pumps, and Primary Armament Targeting.

The recommended modification research order is:

  1. 7.7 mm AP belt
  2. Smokescreen
  3. Artillery Support
  4. Dry-Docking

After that, research the rest of the modifications in whatever order you prefer.


Primary armament

2 х Turret4 x 7.72 mm Lewis machinegun 1916
Ammunition3880 rounds
Belt capacity97 rounds
Fire rate551 shots/min
Main article: Lewis 1916 (7.72 mm)

The primary armament consists of eight 7.72 mm Lewis 1916 machineguns in two quadruple mounts, one on the bow and one on the stern. There are 3,880 rounds of ammunition available for each mount, 970 rounds per gun, for a total of 7,760 rounds. Stock, the mounts can traverse horizontally and vertically at a rate of 64°/s; with the "Primary Armament Targeting" modification installed, this is increased to 75°/s. Each gun has a magazine capacity of 97 rounds and a cyclic rate of fire of 551 rounds/min. With a stock crew, the guns can be reloaded in 18.2 seconds; with an aced crew, they can be reloaded in 14 seconds. The 7.72 mm Lewis 1916 machinegun has an absolute maximum range of about 1.7 km against surface targets.

The 7.72 mm Lewis 1916 machineguns, like other low-calibre machineguns, each individually have very poor damage outputs. With their relatively large magazine size and eight of them in total, though, MTB-1 1 series is able to destroy most opponents without needing to reload, assuming that most of the shots land. This, however, comes at the cost of an incredibly long reload, the longest of any reserve vessel and one of the longest of any coastal fleet vessel in general. Because of this, it's best to always fire off any remaining ammunition after engagements to begin reloading in safety and to ensure full magazines at the start of the next engagement.

Msg-info.png Turrets are named sequentially, clockwise, starting at the bow
Primary Armament Guidance
No.1 Turret (fore) No.2 Turret (aft)
Horizontal Vertical Horizontal Vertical
±180° -5°/+43° ±160° -5°/+43°

The front gun mount is able to fire in all directions except in a ~34° arc directly behind it. Because of the depth charge racks, the aft gun mount is unable to target any close-range targets in a ~42° arc on each side facing forwards, even if the depth charge racks are empty. The rear gun mount also cannot fire in a ~30° arc directly behind either.

There are three ammunition types available:

  • Universal: AP · T · AP · T
  • 7.7 mm AP belt: AP · AP · AP · T
  • 7.7 mm API belt: IT · IT · IT · AP
Penetration Statistics
Ammunition Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
Universal 10 9 8 7 6 5
7.7 mm AP belt 10 9 8 7 6 5
7.7 mm API belt 10 9 7 6 5 5

Within all of the belts, the AP round is the main damage dealer. The T round deals very little damage to both surface targets and aircraft, only really being useful as a guide for aiming. As a result, the AP belt, with its 3:1 ratio of AP:T rounds, is the most effective in all situations. The Universal belt, with its 1:1 ratio of AP:T rounds, is a direct downgrade from the AP belt in terms of damage and should be replaced by the AP belt as soon as it's unlocked. While the API belt, comprising wholly of IT rounds, may initially seem like the best option due to the incendiary effect of the IT rounds, the IT round in practice is actually comparable to the T round in damage, rarely starting fires and doing incredibly little damage against surface targets. Against aircraft, the difference in damage between the AP belt and the API belt is negligible.

Additional armament

Setup 12 x 18 inch Mk.XII torpedo
Setup 24 x Mk.VII depth charge
Setup 32 x 18 inch Mk.XII torpedo
4 x Mk.VII depth charge

MTB-1 1 series has four setups:

  1. 2 x Mk.XII torpedo
  2. 4 x Mk.VII depth charge
  3. 2 x Mk.XII torpedo, 4 x Mk.VII depth charge
  4. Without load


MTB-1 1 series can carry two 18 inch Mark XII torpedoes. These are carried internally in the aft of the boat and are launched through the transom tail first, i.e. facing forwards.

Torpedo Characteristics
Torpedo Mode Mass (kg) Maximum speed in water (km/h) Travel distance (km) Depth stroke (m) Arming distance (m) Explosive type Explosive mass (kg) TNT equivalent (kg)
No 1559 83 5.50 1 50 TNT 224 224
Yes 1559 107 3.67 1 50 TNT 224 224

The 18-inch Mk.XII is fairly average in terms of maximum speed and range, though it has a rather small explosive mass compared to other torpedoes. Still, a hit with the Mk.XII torpedo is more than enough to destroy any boat. Besides that, this torpedo is unnoteworthy.

The Torpedo Mode modification is available as a rank IV modification. Installing it will give the following changes:

Torpedo Mode Specification Changes
Max Distance (m) Max Speed (m/s)
-1829 +7

Once unlocked, it's best to always keep Torpedo Mode installed. The maximum speed of a torpedo is much of valuable in coastal battles than its maximum range. Coastal fleet maps are also small enough that the decreased range with Torpedo Mode installed isn't much of an issue. Note, though, that the Torpedo Mode modification on MTB-1 1 series has the opposite effect compared to most other vessels. Typically, the maximum range is increased at the cost of speed.

In RB, always set the depth stroke to the minimum 1 m setting. This is because many vessels that MTB-1 1 series can face will not have a deep enough draught to fuze the torpedo at a depth stroke setting of 4 m. In AB, depth stroke is automatically set to the most optimal setting.

When using torpedoes, be aware that unless they are already launched, the torpedoes be shot at and destroyed. Upon being destroyed, there is relatively high chance for them to detonate, instantly destroying the boat. To avoid this, fire the torpedoes early on in battle — as well as after any subsequent reloads in AB — or simply don't take them at all. Torpedoes are a situational weapon, so it's largely down to personal preference whether or not to take them.

Depth Charges

Mk.VII depth charges numbered according to their drop order.

The Mk.VII depth charges are carried behind the bridge in racks, two on each side. They are dropped one at a time in the following order:

  1. Port, foremost
  2. Starboard, foremost
  3. Port, aftmost
  4. Starboard, aftmost

Before spawning, the detonation time delay can be set anywhere between 3 seconds and 10 seconds.

Depth Charge Characteristics
Mass (kg) Explosive Type Explosive Mass (kg) TNT Equivalent (kg)
196 TNT 130 130

There is almost no practical reason to use depth charges on any naval vessel in the game. Although they usually result in a one-hit kill if used properly, they are extremely situational, requiring the player to close to point-blank ranges to even use them. In almost every case, anytime a depth charge could be used, the guns or torpedoes can be used instead to greater effect. In fact, depth charges tend to actually be a liability in battle, since they essentially act as exposed ammo racks before they're dropped. Like torpedoes, they can be shot at, and if destroyed, they have a chance to detonate, instantly destroying the boat.

Despite this, some success can be had in dropping them very close to a slower opponent. When doing this, remember the depth charge drop order, since most likely, only the depth charges dropped on the side closed to the enemy will deal any damage. Additionally set the depth charge time delay to the minimum 3 seconds, since any higher time delay only depth charge to sink further away from the target, giving them more time to move out of the way. Again, using depth charges is extremely situational, and they will only be a liability the vast majority of the time, so take them at your own discretion.

Usage in battles

MTB-1 1 series with the historical camouflage "MTB-1 '01', available on the Gaijin Marketplace.

During combat, sailors must remember the MTB-1 1 series only carries enough ammunition for five reloads, so only fire when is actually possible to land the shots. With the problem of the main guns' firing range limiting to close combats, this becomes a relevant gameplay factor to consider. During battles, avoid long-distance (+2 km) duels with enemy boats because MTB-1 will likely lose against them.

Certain long-distance duels are often in maps as the Black seaport and Mediterranean port. Here one of the capture points will be quite far from the main action. If the MTB-1 attempts to capture it, captains should not forget to avoid distant engagements. A common German enemy; the LS 3, outguns and outspeeds the MTB-1. Despite having a lesser crew, this type of enemy can cause a lot of trouble while the MTB's guns will be ineffective.

Some roles in which the MTB-1 Series 1 can perform:

Sea brawler

This is one of the MTB-1's strengths. With good manoeuvrability, the MTB-1 can surprise enemy boats and open fire really close to them. Using the good turning abilities to try and dodge the enemy's main guns while firing too; working with every cover to become a harder target to hit. Employ the MTB-1's mobility to sneak close and personal, using secondary armaments such as the torpedoes and depth charges to multiply the damage; is here when depth charges and torpedoes take an important role. Big targets such as the R-boots and the VAS 201 are vulnerable to them. Be aware, they can carry depth charges and mines so sometimes is better to use the torpedoes and keep the distance. Perform lighting attacks then retreating with a smoke cover back to allies.

There is also the possibility to request a battleship's main calibre artillery. This one is very important if sailors see groups of enemies seizing a point or going through a tight coastal passage. Often this artillery attacks will swing apart the fragile and light boats. Pretty remarkably sighting indeed!

Close-range aircraft interception

The MTB-1 1 series can be used to intercept enemy planes, flying boats, and bombers flying low towards allied shipping. Considering these planes sometimes will be slow, the work is pretty much doable for the MTB-01 (The guns provide immediate sustained fire, enough to track and fix the leading). Thanks to the decent turret range and mobility, the MTB-1 could always keep the enemy plane at gunpoint.

If about to be attacked by an enemy plane, the MTB-1 can disengage, turn in the opposite direction and use a smoke cover to defend. This tactic is also valuable if is needed to protect an allied ship.

An important thing to remember is to avoid firing planes out of range. This often could lead to several planes attacking overwhelmingly since the location of the MTB-1 got exposed by its own tracers. It could be wiser to wait for a closer enemy approach before opening fire.

With these tactics, captains could additionally appeal for the speed and the small silhouette of the MTB-1, attempting to avoid combat not only staying behind the allied side of the map but often going after the allied boats and ships; providing fire support and also repairing any bigger squadmate in need. Any sort of indirect fire without taking damage is the goal. Help maintain capture points or help attack points then fall back when necessary.

  • On arcade, the torpedoes are particularly useful in close maps such as Andaman sea or African gulf. There MTB-1 can constantly reload torpedoes and keep launching them in numerous directions. Such as capture zones and the enemy's spawn zones; something should eventually get to them. Don't forget the availability of torpedo mode.
  • Don't forget to destroy the whole enemy's compartments (coloured black once destroyed). Proceed to fire on other areas of the boat, once a compartment has been destroyed. This means the ammo of the MTB-1 will be used efficiently while exposing the boat to the minimum amount of damage.
  • If the MTB fires at a single section of the enemy boat, is unlikely it will be destroyed. Scatter the fire tactically.

Pros and cons


  • Relatively large magazine capacity: can destroy most opponents without needing to reload
  • Large volume of fire can quickly take down low-flying aircraft
  • Capable of quickly achieving and sustaining usable top speed
  • Surprisingly agile and with a small turn radius once fully upgraded, quite on par with the LS 4 Esau
  • Third best crew count among reserve boats
  • Due to large spaced compartments, it can survive relatively well


  • Only armed with small-calibre guns: low damage output per gun
  • Guns are severely outranged by most of the other Rank I boats (+1.5 km)
  • Longest reload of any reserve boat
  • Relatively weak torpedoes (low explosive mass compared to other similar torpedoes)
  • Big target compared to other smaller reserve boats; it receives alot of fire


Though the Royal Navy had operated a small number of coastal boats during the first World War, by the 1930s, these flotillas had long been dissolved and the Royal Navy had yet to construct any more. The first two coastal boats since WWI were ordered on 27th September 1935 by the Royal Navy, the order being given to British Power Boat Company based at Hythe, a town near Southampton. In addition to this initial order, four more were ordered on 19th October 1935. These six boats were completed by November 1936, and, with their commissioning on 27th April 1937, the Royal Navy Coastal Forces was founded. Following this, three more boats were ordered on 7th December 1936 and nine more on 11th January 1938. In total, 18 boats were ordered, all of them being completed by 1939.

These boats had a standard displacement of 18 tons and had a length of 60 ft. 4 in., a width of 13 ft. 4 in., and a drought of 2 ft. 10 in. at standard displacement. They were powered by three Napier Sea Lion petrol engines, each driving a single shaft, and could reach speeds of around 30-35 knots. Each boat could carry two 18 inch torpedoes which were stored internally on rails above the engines. On the stern were two more rails that could be folded down to the transom, extending the torpedoes' rails outside of the boat. The torpedoes fired facing forwards down the rails, after which the boat that fired them would have to turn to evade their path. In addition to torpedoes, the boats were also armed with a number of depth charges and, depending on the exact boat, up to eight Lewis guns.

MTB 1, the first of the boats, was redesignated MTB 7 in 1937. Similarly, MTB 7 was redesignated MTB 1 in the same year. In 1938, the former MTB 1, now MTB 7, was redesignated MTB 13. At the same time, MTB 13 was redesignated MTB 7. Finally, later in 1938, the former MTB 1, now MTB 13, was again redesignated MTB 19. Thus, by the start of WWII, the boats were numbered MTBs 1-12 and 14-19 and formed two MTB flotillas: 1st MTB Flotilla, consisting of MTBs 1-6 and 14-19; and 2nd MTB Flotilla, consisting of MTBs 7-12.

The 1st MTB Flotilla was sent to the Mediterranean at the start of WWII and was based at HMS Vulcan in Malta. They were soon recalled back to England in December 1939 to be based at HMS Beehive, Felixstowe, though MTB 19 was sent to HMS Vernon, Portsmouth. Along the way back, due to bad weather, MTB 6 had to be foundered. After they arrived, the remaining boats continued to operate in the English Channel until they were either lost or replaced. Those lost were MTBs 15, 16, and 17, all of which were mined in 1940.

The 2nd MTB Flotilla was commissioned in 1938 and assigned to HMS Tamar, Hong Kong. They were all lost during the Battle of Hong Kong in December 1941. MTB 8 was bombed by IJN aircraft and was damaged beyond repair, and MTB 12 was sunk in action by IJN landing craft. The remainder of the 2nd MTB Flotilla was scuttled on 26th December 1941.

Differences between close variant

The MTB-1 1 series is visually similar to 2 series, only a few minor variations are notable due to the armament placement; the depth charges and the turrets of 1916 Lewis machine guns. Technical specifications remain the same on both series, while the 2 Series receives a premium bonus.MTB-1 1 Series
  • 4 x Mk.VII depth charge
  • Turrets are placed at the bow and stern

MTB-1 2 Series

  • 6 x Mk.VII depth charge
  • Turrets are placed near the bridge
  • Premium


See also

Similar class/series
Other contemporary British boats

External links

Britain boats
Motor torpedo boats  Brave class (P1011) · Dark class (FPB 1102) · Dark class (FPB 1102) TD · Fairmile D (617) · Fairmile D (697) · Fairmile D (5001) · MTB-1 1 series
  MTB-1 2 series · Vosper 1 series · Vosper 2 series
Motor gun boats  Dark class (FPB 1101) · Fairmile A (ML100) · Fairmile B (ML345) · Fairmile C (312) · Fairmile C (332) · Fairmile D (601)
  MGB-61 · MGB-75 · SGB (S304) · SGB (S309)
Gunboats  River class (K-246)