OF-6 (commodore) to OF-9 (admiral) are referred to as flag officers, OF-3 (lieutenant-commander) to OF-5 (captain (N)) are referred to as senior officers, while OF-2 (lieutenant (N)) and OF-1 (sub-lieutenant) are referred to as junior officers.
Ранги с "OF-6" (коммодор) до "OF-9" (адмирал) — флагманы, с "OF-3" (лейтенант-коммандер) до "OF-5" (капитан) — старшие офицеры, "OF-1" (младший лейтенант) и "OF-2" (лейтенант) — младший офицерский состав.