8 inch/55 Mark 12 (203 mm)

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Description

Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.

Vehicles equipped with this weapon

General info

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Available ammunition

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Penetration statistics
Ammunition Type of
warhead
Penetration @ 0° Angle of Attack (mm)
1,000 m 2,500 m 5,000 m 7,500 m 10,000 m 15,000 m
Mk.14 Common Common 110 98 80 66 56 43
Mk.21 APCBC APCBC 390 348 289 243 207 165
Mk.25 HC HE 61 61 61 61 61 61
Mk.17 SP Common SP Common 131 116 95 79 66 50
Shell details
Ammunition Type of
warhead
Velocity
(m/s)
Projectile
mass (kg)
Fuse delay
(s)
Fuse sensitivity
(mm)
Explosive mass
(TNT equivalent) (kg)
Ricochet
0% 50% 100%
Mk.14 Common Common 823 117.9 0.035 9 4.84 47° 60° 65°
Mk.21 APCBC APCBC 762 151.9 0.035 9 2.21 48° 63° 71°
Mk.25 HC HE 823 117.9 0 0.1 9.5 79° 80° 81°
Mk.17 SP Common SP Common 823 117.9 0.035 9 4.61 48° 63° 71°

Comparison with analogues

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Usage in battles

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Pros and cons

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Pros:

Cons:

History

The Washington Naval Treaty signed in 1921 maintained that heavy cruisers would be armed with 8 inch guns. The United States Navy first created the 8 inch/55 Mark 9 guns for their heavy cruisers, but they were heavier and bulkier compared to the 8 inch guns of the other signatory nations. As a result, the 8 inch, 55 calibre Mark 12 gun was created as a more lightweight alternative. With a chromium-lined barrel to increase the life of the barrel, the Mark 12 removed the construction hoops to bring the weight to 17 tons from the Mark 9's 30 tons. There were two mountings for the Mark 12. The first was the Tuscaloosa sub-class of the New Orleans-class, which used the same triple mountings as the Mark 9, but had a lower revolving weight. To decrease the shell dispersion and improve accuracy, the USS Wichita and USS Baltimore mounted individually sleeved guns in further spaced twin turrets. The Mark 12 would eventually give way to the Mark 15 which had a slightly smaller chamber and different rifling twist that would enter service first on the Baltimore's sister ships.

Media

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See also

External links

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


USA naval cannons
20 mm  20 mm/70 Oerlikon Mk.II · 20 mm/70 Oerlikon Mark V · 20 mm/70 Oerlikon Mark 24
25 mm  25 mm/87 Mk.38
28 mm  1.1 inch/75 Mk.1
37 mm  AN-M4
40 mm  Bofors L/60 Mark 1 · Bofors L/60 Mark 2 · Bofors L/60 Mark 3
76 mm  3 inch/23 Mk.4 · 3-inch/50 Mk.10 · 3-inch/70 Mk.37 · 3-inch Mark 10 · 3 inch Mk.33 · 3-inch Mk.34
102 mm  4 inch/50 Mk.9
127 mm  5 inch/25 Mk.11 · 5 inch/25 Mk.13 AA · 5 inch/38 Mk.12 · 5-inch/50 Mk.5 · 5 inch/51 Mk.7 · 127 mm/54 Mark 18
152 mm  6 inch/47 Mk.16 · 6 inch/53 Mk.12
203 mm  8 inch/55 Mark 9 · 8 inch/55 Mark 12 · 8 inch/55 Mark 14
305 mm  12-inch/45 Mk.5 · 12 inch/50 Mk.7 · 12 inch/50 Mk.8
356 mm  14 inch/45 Mk.8