premise: Commodore is only used in many land armies.
hypothesis: Commodore ( Cmdre ) is the lowest flag officer rank in the Royal Canadian Navy of the Canadian Forces . Commodore was an early title and later a rank in the United States Navy , United States Coast Guard and the Confederate States Navy . Today , it is no longer a rank , but it continues to be used as an honorary title within the U.S. Navy and the U.S. Coast Guard for those senior captains ( pay grade O-6 ) in command of operational organizations composed of multiple independent subordinate naval units ( e.g. , multiple independent ships or aviation squadrons ) . Commodore is a naval rank used in many navies that is superior to a navy captain , but below a rear admiral . It is sometimes abbreviated : as `` Cdre '' in British Royal Navy , `` CDRE '' in the US Navy , `` Cmdre '' in the Royal Canadian Navy , `` COMO '' in the Spanish Navy and in some navies speaking the Spanish language , or `` CMDE '' as used in the Indian Navy or in some other Navies .