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Mogami Class Cruiser

 

Specifications
 Written by
James Davies

 

Cruiser Mogami

 

Key Information
Country of Origin Japan
Manufacturers Kure Navy Yard; Mitsubishi (Nagasaki); Yokosuka Navy Yard; Kawasaki (Kobe)
Major Variants -
Role Reconnaissance, commerce protection, convoy escort
Operated by Imperial Japanese Navy
First Laid Down 27 October 1931
Last Completed 31 October 1937
Units Mogami, Mikuma, Suzuya, Kumano
 
 

Specifications
Mogami As-Built (1935) Mogami Up-Gunned (1941)
Vessel Particulars
Displacement
- Standard 11,200 long tons 12,400 long tons
- Full Load 13,980 tonnes 15,057 tonnes
Length (OA) 200.60 m 200.60 m
Length (WL) 197.00 m 197.00 m
Length (PP) 189.00 m 189.00 m
Beam 20.60 m 20.60 m
Draft (Standard) 5.50 m Unknown
Draft (Full Load) [Note 1] 6.5 m 6.4
Block Coefficient 0.572 0.604
Propulsion 152,000 SHP 152,000 SHP
Speed [Note 2] 37 kts (design)
36.4 kts (trials) [Note 4]		 35 kts (design)
34.7 (trials) [Note 5]
Weapons
Main Guns 15 x 15.5-cm (6.1-in) guns in 5 triple mounts 10 x 20.0-cm (8-in) gins in 5 double mounts
Other Guns [Note 3] 4 x 12.7-cm guns in two double mounts
8 x 25-mm machineguns in four twin mounts
4 x 13-mm machineguns in two twin mounts		 8 x 12.7-cm guns in four double mounts
8 x 25-mm machineguns in four twin mounts
4 x 13-mm machineguns in two twin mounts
Torpedoes 12 x 24-inch torpedoes in four triple mounts 12 x 24-inch torpedoes in four triple mounts
Magazine 2,250 x 15.5-cm shells
480 x 12.7-cm shells (1,040 maximum)
16,000 x 25 mm shells
10,000 x 13mm shells		 1,200 x 20.0-cm shells (1,280 maximum)
960 x 12.7-cm shells (1,040 maximum)
16,000 x 25 mm shells
10,000 x 13mm shells
Armour    
Side Belt 100 mm to 25 mm (tapering downwards), inclined 100 mm to 25 mm (tapering downwards), inclined
End Bulkheads 105 mm (upper)
65 mm (lower)		 105 mm (upper)
65 mm (lower)
Magazine Sides 140 mm to 30 mm (tapering downwards), inclined
Ends 100mm to 140 mm
Top 40 mm		 Sides 140 mm to 30 mm (tapering downwards), inclined
Ends 100mm to 140 mm
Top 40 mm
Barbette 25 mm 25 mm
Turret 25 mm front, sides, back and roof 25 mm front, sides, back and roof
Deck 35 mm to 60 mm 35 mm to 60 mm
Miscellaneous
Aircraft 3 x seaplanes stowed on deck
(Type 94 No. 1 or Type 90 No. 2)		 4 x seaplanes stowed on deck (3 carried in practice)
(Type 94 No. 2, Type 95 or Type 0 No. 1)
Compliment 930 896

Note 1: The full-load draft is an estimate, calculated using the waterline coefficient at the trials displacement.  It should be a reasonable estimate.
Note 2: Design speed was never achieved
Note 3: The design was for 8 x 12.7-cm guns, however the aft two mounts were not fitted for two years due to shortages
Note 4: Using overload power (161,000 SHP) at 12,464 long tons displacement
Note 5: At 13,600 long tons displacement
 
 

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