Grand Admiral a naval rank in one of the highest in the several European navies that use this system, what system are they using?
Grand admiral Grand admiral is a historic naval rank, the highest rank in the several European navies that used it. It is best known for its use in Germany as "Großadmiral". A comparable rank in other navies is that of fleet admiral.
Lieutenant (navy) (Canada) In the Royal Canadian Navy, the rank of Lieutenant (N) (Lt(N)) (French: "Lieutenant de vaisseau" ) is the naval rank equal to Captain in the army or air force. Lieutenants (N) are senior to Sub-Lieutenants and to army and air force Lieutenants, and are junior to Lieutenant-Commanders and Majors.