Keywords: US Navy 071212-N-4772B-133 A Marine Corps CH-53 helicopter hovers over the water off the coast of Imperial Beach, Calif. as it prepares to release an 11-meter rigid inflatable boat (RIB).jpg en IMPERIAL BEACH Calif Dec 12 2007 A Marine Corps CH-53 helicopter hovers over the water off the coast of Imperial Beach Calif as it prepares to release an 11-meter rigid inflatable boat RIB during a maritime extraction air transportation system evolution Special warfare combatant-craft crewmen use this maritime transportation capability to move RHIBs and special operation crafts-riverine as well as the boat crews from land to water U S Navy photo by Mass Communication Specialist 1st Class Brian P Biller Released 2007-12-12 071212-N-4772B-133 Navy http //www navy mil/view_image asp id 54046 U S Navy photo by Mass Communication Specialist 1st Class Brian P Biller PD-USGov-Military-Navy Images from US Navy location Imperial Beach Calif |