12.5inch Twin Secondary Gun Mount
|Coastal Defense Ship||Destroyer|
|Heavy Cruiser||Training Cruiser|
|Aviation Cruiser||Fast Battleship|
|Light Carrier||Standard Aircraft Carrier|
|Armored Carrier||Seaplane Tender|
|Submarine||Aircraft Carrying Submarine|
|Repair Ship||Amphibious Assault Ship|
- It have been suggested that the name of this equipment might come from mistakenly treating the name of Mk.12 5 inch secondary gun.
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