navy or maritime force is a fleet of waterborne military vessels associated naval aviation, both sea-based and land-based
WHEN YOU SAY NAVY YOU MEAN IKE NAVY SEALS
Naval operations can be broadly divided between riverine and littoral applications 
dO THEY USE AMPHIBIOUS WEAPONS LIKE TANKS OR HOVER CRAFT, LAND SEA AND AIR
Well they sometimes do,but their strategic task of the navy also may incorporate nuclear deterrence by use of submarine-launched ballistic missiles.
IVE BEEN TO THE MARINE BASE IN JACKSON NORTH CAROLINA
Their strategic combat operations includes anything conducted by surface ships, amphibious ships, submarines, and seaborne aviation, as well as ancillary support, communications,