MO-4

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Rank 4 USA
USS Helena Pack
MO-4
ussr_mo_4.png
GarageImage MO-4.jpg
MO-4
AB RB SB
1.7 1.7 1.7
Research:4 000 Specs-Card-Exp.png
Purchase:2 100 Specs-Card-Lion.png
Show in game

Description

The MO-4 Type is a rank I Soviet motor gun boat with a battle rating of 1.7 (AB/RB/SB). It was introduced during Update 1.79 "Project X" when the Soviet fleet was implemented into the game. MO stands for Malyj Okhotnik, Russian for Small Hunter.

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 center, 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 has a displacement of 52 tons.

Modifications and economy

Repair costBasic → Reference
AB290 → 365 Sl icon.png
RB570 → 718 Sl icon.png
Total cost of modifications5 040 Rp icon.png
3 050 Sl icon.png
Talisman cost300 Ge icon.png
Crew training600 Sl icon.png
Experts2 100 Sl icon.png
Aces40 Ge icon.png
Research Aces110 000 Rp icon.png
Reward for battleAB / RB / SB
30 / 40 / 100 % Sl icon.png
100 / 100 / 100 % Rp icon.png
Modifications
Seakeeping Unsinkability Firepower
Mods new ship hull.png
Dry-Docking
Research:
220 Rp icon.png
Cost:
130 Sl icon.png
60 Ge icon.png
Mods new ship rudder.png
Rudder Replacement
Research:
170 Rp icon.png
Cost:
100 Sl icon.png
50 Ge icon.png
Mods new ship screw.png
Propeller Replacement
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
80 Ge icon.png
Mods new ship engine.png
Engine Maintenance
Research:
290 Rp icon.png
Cost:
180 Sl icon.png
80 Ge icon.png
Mods ship tool kit.png
Tool Set
Research:
220 Rp icon.png
Cost:
130 Sl icon.png
60 Ge icon.png
Mods manual ship extinguisher.png
Fire Protection System
Research:
170 Rp icon.png
Cost:
100 Sl icon.png
50 Ge icon.png
Mods engine smoke screen system.png
Smokescreen
Research:
170 Rp icon.png
Cost:
100 Sl icon.png
50 Ge icon.png
Mods new ship pumps.png
New Pumps
Research:
290 Rp icon.png
Cost:
180 Sl icon.png
80 Ge icon.png
Mods tank ammo.png
45mm_ussr_21k_o240_naval_he_ammo_pack
Research:
220 Rp icon.png
Cost:
130 Sl icon.png
60 Ge icon.png
Mods tank ammo.png
12mm_dshk_navy_he_ammo_pack
Research:
220 Rp icon.png
Cost:
130 Sl icon.png
60 Ge icon.png
Mods tank ammo.png
45mm_ussr_21k_naval_ap_ammo_pack
Research:
170 Rp icon.png
Cost:
100 Sl icon.png
50 Ge icon.png
Mods tank ammo.png
12mm_dshk_navy_ap_ammo_pack
Research:
170 Rp icon.png
Cost:
100 Sl icon.png
50 Ge icon.png
Mods new aux caliber turrets.png
Auxiliary Armament Targeting
Research:
170 Rp icon.png
Cost:
100 Sl icon.png
50 Ge icon.png
Mod arrow 0.png
Mods ship rangefinder.png
Improved Rangefinder
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
80 Ge icon.png
Mods ship rangefinder.png
Improved Rangefinder
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
80 Ge icon.png
Mods depth charge.png
Depth Charges
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
80 Ge icon.png
Mod arrow 0.png
Mods new main caliber turrets.png
Primary Armament Targeting
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
80 Ge icon.png
Mods he frag base fuse tank.png
45mm_ussr_21k_naval_base_fuse_he_ammo_pack
Research:
290 Rp icon.png
Cost:
180 Sl icon.png
80 Ge icon.png
Mods rocket launcher.png
Rocket Launcher
Research:
290 Rp icon.png
Cost:
180 Sl icon.png
80 Ge icon.png
Mods rocket launcher.png
Rocket Launcher
Research:
290 Rp icon.png
Cost:
180 Sl icon.png
80 Ge icon.png
Mods ship art support.png
Artillery Support
Research:
290 Rp icon.png
Cost:
180 Sl icon.png
80 Ge icon.png

Armament

Primary armament

2 х Turret45 mm/68 21-KM cannon
Ammunition500 rounds
Vertical guidance-7° / 85°

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.

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.

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 defense 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-caliber 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.

Since the MO-4 does not have good anti-air defense, 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 defenses to extend its lifespan.

Do not forget to use the M-8 rockets when in a bind, they could pull the MO-4 through desperate situations.

Pros and cons

Pros:

  • Two large 45 mm cannons on 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 seakeeping modules
  • Wooden hull can easily catch on fire

History

The MO-4 (produced from 1937-43, approximately 250 built) was the most-produced variant of the MO series of ships, succeeding the MO-1 (1935), MO-2 (1935-36), and MO-3 (1937) versions. Originally designed for anti-sub operations, the MO series also filled a multitude of roles including mine laying and sweeping, escorting convoys, and supporting amphibious landings. The MO-4 remained in service until the end of WWII.

Media

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 TKA 106 · Pr. 123bis · Pr. 123K (A-11) · Pr. 123K "Komsomolets" · Pr.183
Motor gun boats  G-5 (ShVAK) · MO-4 · OD-200 · Ya-5M
Motor torpedo gun boats  Pr. 206 · Pr. 206M · MPK pr. 12412
Gunboats  Groza
Armoured gun boats  BMO · MBK-161 (1943) · MBK-161 (1944) · MBK pr.186 · MBK pr.186 (MK 85) · Pr.1124 (1940) · Pr.1124 (1945) · Pr.1124 MLRS
  Pr.191 · Pr.191M · Pr. 1204 · Pr. 1204 late