Type 4 (37 mm)

Description

The 37 mm Type 4 is a naval derivative of the 37 mm Type 94 currently found on the Type 4 anti-submarine motor gun boats.

Vehicles equipped with this weapon

• Type 4 (mod. 2)
• Type 4 (Mod 4)

General info

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Available ammunition

The 37 mm Type 4 has a choice of 2 shells, HE and APHE

• HE - Has good explosive mass for its calibre, but usually can't damage interior modules
• APHE - Low explosive mass, but can penetrate and damage interior modules in ships

Penetration statistics
Ammunition	Type of warhead	Penetration @ 0° Angle of Attack (mm)
		10 m	100 m	500 m	1,000 m	1,500 m	2,000 m
37 mm HE	HE	3	3	3	3	3	3
37 mm APHE	APHE	47	45	37	29	23	18

Shell details
Ammunition	Type of warhead	Velocity (m/s)	Projectile mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive mass (TNT equivalent) (g)	Ricochet
							0%	50%	100%
37 mm HE	HE	677	0.65	0	0.1	69.3	79°	80°	81°
37 mm APHE	APHE	662	0.7	1	3	11	47°	60°	65°

Comparison with analogues

• 45 mm/46 21-K · 45 mm/68 21-KM - Soviet single-shot cannons, generally superior in every way, having higher muzzle velocity, stronger shells, and the same reload speed, only worse in traverse speed, being about half as slow to aim.
• 3 pdr QF Hotchkiss (47 mm) - British single-shot cannon, has about double the explosive mass for its HE shell and the same reload speed, but has no access to any armour-piercing ammunition and has a lower muzzle velocity.

Usage in battles

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Pros and cons

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Pros:

• Fairly accurate gun
• Fast traverse speeds

Cons:

• Low rate of fire and single shot
• Individual rounds do little damage
• Low muzzle velocity

History

A variant of the 37 mm Type 98 tank cannon (itself a derivative of the 37 mm Type 94 gun), the Type 4 was designed in 1943 for mounting on the Type 3 transport submarines. In order to prevent rust, every part was plated in chromium, and waterproof plugs and drain holes installed. In 1944, an anti-aircraft mount was devised for the weapon, mounted on some Daihatsu-class landing crafts.

Media

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See also

• Type 94 (37 mm)

External links

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• topic on the official game forum;
• other literature.

References

Japan naval cannons
20 mm	JM61 · Type 98
25 mm	25 mm/60 Type 96
37 mm	Type 4 · Type 11 pattern 1922
40 mm	40 mm/62 Vickers
57 mm	Type 97
75 mm	Type 88 AA
76 mm	3-inch/40 Type 41 · 8 cm/40 3rd Year Type · 8 cm/60 Type 98
100 mm	100/65 mm Type 98 mod A
120 mm	120 mm/45 3rd Year Type · 120 mm/45 10th year type
127 mm	5 inch/40 Type 89 · 127 mm/50 3rd Year Type
140 mm	140 mm/50 3rd Year Type
152 mm	6-inch/45 Type 41 · 15 cm/50 Type 41
155 mm	155 mm/60 3rd Year Type
200 mm	20 cm 3rd year type No.1
203 mm	20 cm/45 Type 41 · 20 cm/50 3rd year type No.2
356 mm	36 cm/45 Type 41
410 mm	410 mm/45 Type 3
	Foreign:
20 mm	20 mm/70 Oerlikon Mk.II (USA/Britain)
40 mm	Bofors L/60 Mark 1 (USA) · Bofors L/60 Mark 2 (USA) · Bofors L/60 Mark 3 (USA)
47 mm	3 pdr QF Hotchkiss (Britain)
76 mm	3-inch Mark 10 (USA) · 3 inch Mk.33 (USA) · 3-inch Mk.34 (USA)
120 mm	4,7-inch/40 Armstrong (Britain)
127 mm	5 inch/38 Mk.12 (USA)
305 mm	12-inch/45 Vickers (Britain) · 12-inch/50 Vickers (Britain)