Related by context. Frequent words. (Click for all words.) 53 submarine 49 submersibles 48 sonar 47 underwater robot 47 hydrophone 47 underwater sonar 46 remotely operated 46 spy satellites 46 Aegis radar 46 underwater robots 46 radar altimeter 46 highly maneuverable 46 robotic submarine 45 warship 45 sonars 45 remotely piloted aircraft 45 rubber dinghies 45 naval destroyer 45 unmanned underwater 45 robotic submarines 44 supersonic cruise missile 44 submersible 44 navy destroyer 44 motherships 44 Vigilant Eagle 44 divers 43 conning tower 43 dirigible 43 frogmen 43 Aegis destroyer 43 submarines 43 Super Stallion 43 interceptor missile 43 torpedo tubes 43 helicopter 43 unmanned aerial vehicle 43 naval vessels 43 incoming ballistic missiles 43 spacecraft 43 orbiting spacecraft 42 resupply missions 42 navy ships 42 robotic spacecraft 42 pingers 42 Bulava missile 42 hovercraft 42 Taurus XL rocket 42 warships 42 Cheonan sank 42 inflatable boats 42 AUVs 42 insertion tube 42 AWACS aircraft 42 Ares IX rocket 42 navy 42 unmanned 42 Unmanned Aerial Vehicle UAV 42 USS Nassau 42 spy drones 42 Plesetsk 42 lunar module 42 Akula class 42 geostationary satellites 42 unpiloted 42 helicopters 41 underwater 41 naval ships 41 naval warships 41 satellites 41 unmanned spacecraft 41 Unmanned Aerial Vehicles 41 ocean buoys 41 Brahmos 41 X #B 41 minesweeping 41 BrahMos missile 41 periscope 41 Submarine 41 MBARI 41 interceptor 41 nuclear submarine Kursk 41 hydrophones 41 navy commandos 41 drogue 41 cargo ships 41 Qantas jetliner 41 ships 41 pirate skiffs 41 towline 41 HMS Astute 41 Unmanned Aerial Vehicles UAVs 40 Tornado GR4 40 hydraulic jacks 40 Global Surveyor 40 Arctic Sea 40 scramjet 40 HMAS Sydney 40 AWACS surveillance planes 40 reconnaissance 40 propellor 40 ship