Translation guide
A command or directive issued by the Imperial Japanese Navy. This is a specific historical term, not a general word for 'order'.
The learner wants to refer to an official command or directive from the Imperial Japanese Navy.
Standard term for an order issued by the navy. '海軍' means navy, '命令' means order/command.
その海軍命令は全艦隊に伝達された。
The imperial navy order was communicated to the entire fleet.
More explicit, including '帝国' (imperial). Used when emphasizing the Imperial Japanese Navy specifically.
帝国海軍命令により、出撃が決定された。
By imperial navy order, the sortie was decided.
Literally 'order of the navy'. A slightly more descriptive phrasing.
海軍の命令に従って行動した。
They acted in accordance with the imperial navy order.
This term specifically refers to orders from the Imperial Japanese Navy (pre-1945). For modern naval orders, use '海上自衛隊の命令' (Japan Maritime Self-Defense Force order) or simply '海軍命令' in a generic context.