WesWorld

Japan’s Naval Developments – Q2/1924 (the short version)

A. Industrial Allocation

15/27 factories producing warship material = 15,000 t. No stockpiled materials available. 15,000 t are used, no materials stockpiled.

12/27 factories are dedicated to producing infrastructure material, = 1.2 pts.

B. Infrastructure Development

Type 0 slip at Kagoshima Navy Yard receives 0.2 pts, for a total of 0.5 pts (designation Slip 0-8A).
Type 0 slip at Kagoshima Navy Yard receives 0.2 pts, for a total of 0.5 pts (designation Slip 0-8B).
Type 0 dock at Kagoshima Navy Yard receives 0.4 pts, for a total of 1.0 pts ( designation Dock 0-8A).
Type 1 slip at Kure Navy Yard receives 0.1 pts, for a total of 0.1 pts (designation Slip I-1B).
Type 1 slip at Yokosuka Navy Yard receives 0.1 pts, for a total of 0.1 pts (designation Slip I-2B).
Type 1 slip at Kawasaki Co. receives 0.1 pts, for a total of 0.1 pts (designation Slip I-3A).
Type 1 slip at Mitsubushi Co. receives 0.1 pts, for a total of 0.1 pts (designation Slip I-4A).

C. Naval Construction

Kure Navy Yard, Kure (Honshu)
Slip V-1A => Kii laid down 4/1/1924, receives 2499 tons
Slip I-1A => Fubuki laid down 4/1/1924, receives 420 tons
Slip I-1B => Under construction
Dock V-1A => idle
Free-floating: DD3 Vralgo Kentauri receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Meeth Silver receives 51 tons. Completed 5/10/1924
Free-floating: DD3 Michael Lester receives 51 tons. Completed 5/10/1924

Yokosuka Navy Yard, Yokosuka (Honshu)
Slip V-2A => idle
Slip I-2A => GB Go ni Mk.1 IV receives 468 tons. Launched 5/13/1924
Slip I-2B => Under construction
Free-floating: DD3 Blreno Canzian receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Dimor Hiahraki receives 51 tons. Completed 5/10/1924

Kawasaki Co, Kobe (Honshu)
Slip V-3A => idle
Slip II-3A => GB Go ni Mk.2 I receives 762 tons. Launched 6/7/1924
Slip I-3A => Under construction
Dock II-3A => BB Okinoshima leaves dock
Free-floating: DD3 Barbaluse V. receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Iler the Bishop receives 51 tons. Completed 5/10/1924

Mitsubushi Co, Nagasaki (Kyushu)
Slip V-4A => idle
Slip II-4A => Go ni Mk.2 II receives 762 tons. Launched 6/7/1924
Slip I-4A => Under construction
Dock II-4A => BB Mishima leaves dock
Free-floating: DD3 Trao Ballanka receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Palu Suyene receives 109 tons. Completed 6/22/1924

Fukuoka Navy Yard, Fukuoka (Kyushu)
Slip III-5A => CA Miyazawa Yukino receives 1,853 tons.
Slip II-5A => idle
Slip I-5A => Shirayuki laid down 4/1/1924, receives 420 tons
Dock III-5A => idle
Free-floating: DD3 Mell Sacheir receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Viscount Huah von Hitter receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Jabo Beat receives 51 tons. Completed 5/10/1924
Free-floating: DD3 Dougulus Kaien receives 51 tons. Completed 5/10/1924

Hakodate Navy Yard, Hakodate (Hokkaido)
Slip III-6A => CA Sakura Tsubaki receives 1,853 tons.
Slip II-6A => idle
Slip I-6A => Hatsuyuki laid down 4/1/1924, receives 420 tons
Free-floating: DD3 Mell Rince Usare Tama receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Senkoukei Tomoe receives 51 tons. Completed 5/10/1924

Aomori Navy Yard, Aomori (Honshu)
Slip III-7A => idle
Slip I-7A => Murakumo laid down 4/1/1924, receives 420 tons
Dock I-7A => idle
Free-floating: DD3 Zoom receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Ko Fan Shiemar receives 51 tons. Completed 5/10/1924

Kagoshima Navy Yard, Kagoshima (Kyushu)
Slip III-8A => idle
Slip I-8A => GB Go ni Mk.1 III receives 468 tons. Launched 5/13/1924
Dock I-8A => idle
Slip 0-8A => finishing construction
Slip 0-8B => finishing construction
Dock 0-8A => finishing construction
Free-floating: DD3 Daizina Meister receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Amaterasu dis Green Ooe receives 51 tons. Completed 5/10/1924

Wakayama Navy Yard, Wakayama (Honshu)
Slip III-9A => idle
Slip I-9A => Akatsuki laid down 4/1/1924, receives 426 tons
Dock I-9A => idle
Free-floating: DD3 Label Judah receives 109 tons. Completed 6/22/1924
Free-floating: DD3 Huselles Carliey receives 51 tons. Completed 5/10/1924

Tokushima Navy Yard, Tokushima (Shikoku)
Slip III-10A => idle
Slip I-10A => Hibiki laid down 4/1/1924, receives 426 tons
Dock I-10A => idle
Free-floating: DD3 Maiyu Sukat receives 51 tons. Completed 5/10/1924
Free-floating: DD3 Eidrian Tag receives 51 tons. Completed 5/10/1924

Niigata Navy Yard, Niigata (Honshu)
Slip I-11A => GB Go ni Mk.1 V receives 468 tons. Launched 5/13/1924
Slip I-11B => Inazuma laid down 4/1/1924, receives 426 tons
Dock III-11A => idle
Free-floating: DD3 Myoury Kinky receives 51 tons. Completed 5/10/1924
Free-floating: DD3 Muse van Reyback receives 51 tons. Completed 5/10/1924

Niihama Navy Yard, Niihama (Shikoku)
Slip I-12A => GB Go ni Mk.1 VI receives 468 tons. Launched 5/13/1924
Slip I-12B => Ikazuchi laid down 4/1/1924, receives 426 tons
Dock III-12A => idle
Free-floating: DD3 Sir Bester Orbit receives 51 tons. Completed 5/10/1924
Free-floating: DD3 Picking Harres receives 51 tons. Completed 5/10/1924

D. Transactions

none.

E. Other Notes

CVX Zuiho and Shoho complete shakedown cruises.

Urazen Sie, Poesche Nomien, Sharie Randers Krötenschwanz, Bijotorn Corlala, State Ballo Kaiedia, Nu. Suoad Graphight, Iemrah Lout Jajas, Mishalu Ha Lonn, John Weinzel, Allen Braford, Maximum Holtfors Balance Kaien, Qukey, and Bugle de Leizer continue shakedown cruises.

Ko Fan Shiemar, Amaterasu dis Greens Ooe LED, Huselles Carliey, Eidrian Tag, Myoury Kinky, Sir Bester Orbit, Picking Harres, Vralgo Kentauri, Blreno Canzian, Barbaluse V., Trao Ballanka, Mell Sacheir, Mell Rince Usare Tama, Zoom, Daizina Meister, Label Judah, Maiyu Sukat, Iler the Bishop, Palu Suyene, Viscount Huah von Hitter, Muse van Reyback, Meeth Silver, Dimor Hiahraki, Jabo Beat, Senkoukei Tomoe, Michael Lester, and Dougulus Kaien started shakedown cruises.


New units laid down this quarter:
Battleship Kii requires 37544 tons and 47 months.
Destroyers Fubuki, Shirayuki, Hatsuyuki, and Murakumo require 1539 tons and 11 months each.
Destroyers Akatsuki, Hibiki, Inazuma and Ikazuchi require 1551 tons and and 11 months each.


F. Updated Order of Battle, 30/6/24

Note: Y)+Z = completed (under repair/refit) + under construction

Limited warships:
Battleships: 6(0)+1
Aircraft Carriers: 3(0)+0
Heavy Cruisers: 4(0)+2
Light Cruisers: 14(0)+0
Destroyers class 1: 0(0)+0
Destroyers class 2: 22(0)+8
Submarines: 7(0)+0
Coast Defense Vessels: 3(0)+0
Museum ships: 2(0)+0

Non-limited Warships
Destroyers class 3: 175(0)+0
Gunboats: 26(0)+6
Minelayers: 27(0)+0
Minesweepers: 18(0)+0
Submarine Chasers class 1: 30(0)+0
Submarine Chasers class 2: 42(0)+0
Corvettes: 30(0)+0

Auxiliaries
Ammunition ships: 3(0)+0
Oilers: 9(0)+0
Cargo ships: 32(0)+0
Transport ships: 16(0)+0
Tenders: 7(0)+0
Repair ships: 5(0)+0
Netlayer and target towing vessel: 4(0)+0
Naval Tugs: 12(0)+0

Kii, Japan Battleship laid down 1924

Displacement:
37,544 t light; 39,924 t standard; 43,992 t normal; 47,070 t full load
Loading submergence 1,511 tons/feet

Dimensions:
800.00 ft x 96.00 ft x 35.00 ft (normal load)
243.84 m x 29.26 m x 10.67 m

Armament:
8 - 14.96" / 380 mm guns (4 Main turrets x 2 guns, 2 superfiring turrets) (*)
Aft turrets separated by engine room
16 - 5.12" / 130 mm guns (8 2nd turrets x 2 guns)
24 - 1.97" / 50 mm AA guns
48 - 0.98" / 25 mm guns
Weight of broadside 14,581 lbs / 6,614 kg

Armour:
Belt 14.00" / 356 mm, upper belt 1.50" / 38 mm, ends unarmoured
Belts cover 95 % of normal area
Main turrets 12.00" / 305 mm, 2nd turrets 2.00" / 51 mm
AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm
Armour deck 6.00" / 152 mm, Conning tower 14.00" / 356 mm
Torpedo bulkhead 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 140,000 shp / 104,440 Kw = 29.34 kts
Range 12,000nm at 15.00 kts

Complement:
1,518 - 1,974

Cost:
£11.902 million / $47.609 million

Distribution of weights at normal displacement:
Armament: 2,251 tons, 5.1 %
Armour: 14,945 tons, 34.0 %
Belts: 3,626 tons, 8.2 %, Armament: 3,726 tons, 8.5 %, Armour Deck: 5,869 tons, 13.3 %
Conning Tower: 378 tons, 0.9 %, Torpedo bulkhead: 1,347 tons, 3.1 %
Machinery: 4,611 tons, 10.5 %
Hull, fittings & equipment: 15,636 tons, 35.5 %
Fuel, ammunition & stores: 6,448 tons, 14.7 %
Miscellaneous weights: 100 tons, 0.2 %

Metacentric height 5.1

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.05
Shellfire needed to sink: 40,436 lbs / 18,342 Kg = 24.2 x 15.0 " / 380 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 5.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 50 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.70
Relative quality as seaboat: 1.03

Hull form characteristics:
Block coefficient: 0.573
Sharpness coefficient: 0.38
Hull speed coefficient 'M': 6.93
'Natural speed' for length: 28.28 kts
Power going to wave formation at top speed: 49 %
Trim: 49
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 93.8 %
Relative accommodation and working space: 132.7 %
(Average = 100%)
Displacement factor: 104 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.99
(Structure weight / hull surface area: 198 lbs / square foot or 969 Kg / square metre)
Relative longitudinal hull strength: 1.11
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment -0.37 ft)
Relative composite hull strength: 1.00

(*) See Infrastructure

Fubuki, Japan Destroyer laid down 1924

Displacement:
1,539 t light; 1,594 t standard; 1,742 t normal; 1,854 t full load
Loading submergence 168 tons/feet

Dimensions:
330.00 ft x 33.00 ft x 14.00 ft (normal load)
100.58 m x 10.06 m x 4.27 m

Armament:
6 - 4.13" / 105 mm guns (3 Main turrets x 2 guns, 1 superfiring turret)
6 - 1.57" / 40 mm AA guns
18 - 0.98" / 25 mm guns
Weight of broadside 232 lbs / 105 kg
6 - 24.0" / 610 mm above water torpedoes

Armour:
Main turrets 1.00" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 42,414 shp / 31,641 Kw = 33.30 kts
Range 3,000nm at 15.00 kts

Complement:
134 - 175

Cost:
£0.656 million / $2.625 million

Distribution of weights at normal displacement:
Armament: 29 tons, 1.7 %
Armour: 35 tons, 2.0 %
Belts: 0 tons, 0.0 %, Armament: 35 tons, 2.0 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 958 tons, 55.0 %
Hull, fittings & equipment: 468 tons, 26.9 %
Fuel, ammunition & stores: 203 tons, 11.6 %
Miscellaneous weights: 50 tons, 2.9 %

Metacentric height 1.1

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.07
Shellfire needed to sink: 334 lbs / 151 Kg = 9.5 x 4.1 " / 105 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.57
Relative quality as seaboat: 1.00

Hull form characteristics:
Block coefficient: 0.400
Sharpness coefficient: 0.30
Hull speed coefficient 'M': 8.38
'Natural speed' for length: 18.17 kts
Power going to wave formation at top speed: 68 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 193.1 %
Relative accommodation and working space: 64.5 %
(Average = 100%)
Displacement factor: 56 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 37 lbs / square foot or 182 Kg / square metre)
Relative longitudinal hull strength: 1.54
(for 15.30 ft / 4.66 m average freeboard, freeboard adjustment 4.62 ft)
Relative composite hull strength: 0.56

Akatsuki, Japan Destroyer laid down 1924

Displacement:
1,551 t light; 1,599 t standard; 1,751 t normal; 1,866 t full load
Loading submergence 169 tons/feet

Dimensions:
342.00 ft x 32.00 ft x 14.00 ft (normal load)
104.24 m x 9.75 m x 4.27 m

Armament:
4 - 4.13" / 105 mm guns (4 Main turrets x 1 guns, 2 superfiring turrets)
6 - 1.57" / 40 mm AA guns
18 - 0.98" / 25 mm guns
Weight of broadside 162 lbs / 73 kg
6 - 24.0" / 610 mm above water torpedoes

Armour:
Main turrets 1.00" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 45,064 shp / 33,618 Kw = 34.00 kts
Range 3,030nm at 15.00 kts

Complement:
135 - 175

Cost:
£0.654 million / $2.614 million

Distribution of weights at normal displacement:
Armament: 20 tons, 1.2 %
Armour: 28 tons, 1.6 %
Belts: 0 tons, 0.0 %, Armament: 28 tons, 1.6 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 1,001 tons, 57.2 %
Hull, fittings & equipment: 451 tons, 25.8 %
Fuel, ammunition & stores: 200 tons, 11.4 %
Miscellaneous weights: 50 tons, 2.9 %

Metacentric height 1.4

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.26
Shellfire needed to sink: 344 lbs / 156 Kg = 9.7 x 4.1 " / 105 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 51 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.31
Relative quality as seaboat: 1.02

Hull form characteristics:
Block coefficient: 0.400
Sharpness coefficient: 0.29
Hull speed coefficient 'M': 8.67
'Natural speed' for length: 18.49 kts
Power going to wave formation at top speed: 67 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 196.4 %
Relative accommodation and working space: 63.0 %
(Average = 100%)
Displacement factor: 55 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 35 lbs / square foot or 172 Kg / square metre)
Relative longitudinal hull strength: 1.37
(for 14.90 ft / 4.54 m average freeboard, freeboard adjustment 4.21 ft)
Relative composite hull strength: 0.55