8 inch/55 Mark 12 (203 mm)
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
Tell us about the tactical and technical characteristics of the cannon or machine gun.
Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).
|Ammunition|| Type of
|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.17 SP Common||SP Common||131||116||95||79||66||50|
|Ammunition|| Type of
| Fuse delay
| Fuse sensitivity
| Explosive mass
(TNT equivalent) (kg)
|Mk.17 SP Common||SP Common||823||117.9||0.035||9||4.61||48°||63°||71°|
Comparison with analogues
Give a comparative description of cannons/machine guns that have firepower equal to this weapon.
Usage in battles
Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.
Pros and cons
Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.
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.
Excellent additions to the article would be video guides, screenshots from the game, and photos.
Paste links to sources and external resources, such as:
- 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|
|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 · 8 inch/55 Mark 16|
|305 mm||12-inch/45 Mk.5 · 12 inch/50 Mk.7 · 12 inch/50 Mk.8|
|356 mm||14 inch/45 Mk.8 · 14 inch/45 Mk.12|