A Grand Admiral is a naval rank currently equivalent to Surface Marshal in seniority. A Grand Admiral is typically senior to a Fleet Admiral and junior to a Lord Admiral. Grand Admirals are addressed by rank and name, thereafter by subordinates as "Sir" or "Ma'am". The rank is usually abbreviated to "GAdm." or "GADM".
Traditionally, the rank of Grand Admiral is placed over all existing Naval and Army ranks, even over that of the regional rank of Grand Moff. It is currently in the position of High Admiral.