Related by context. Frequent words. (Click for all words.) 71 sonar 54 hydrophones 52 synthetic aperture radar 52 infrared sensors 50 frequency sonar 50 submersibles 50 infrared detectors 50 hyperspectral 50 submersible 50 scan sonar 50 AUVs 50 oceanographic 50 Aegis radar 49 inertial navigation 49 longlines 49 infra red 49 beaked whales 49 autonomous underwater 48 radars 48 multispectral 48 satellites 48 downriggers 47 infrared imaging 47 remotely operated 47 reconnaissance satellites 47 CCD camera 47 ROVs 47 fish finders 47 geostationary satellites 47 undersea warfare 47 longline fishing 46 Sonar 46 remote sensing 46 autopilots 46 submarines 46 satcom 46 longline 46 tide gauges 46 infrared 46 unmanned aerial vehicles 46 MH #R 46 UAVs 46 hydrographic 46 underwater 46 electronic warfare 45 ScanEagle 45 infrared cameras 45 seamounts 45 Aegis destroyers 45 buoys 45 sensors 45 seismic surveys 45 multi spectral 45 optical telescopes 45 anti submarine warfare 45 electromagnetics 44 trawlers 44 AUV 44 gliders 44 propellers 44 submarine 44 telephoto lenses 44 infrasound 44 polarized sunglasses 44 oceanographers 44 satellites orbiting 44 GPS satellites 44 Global Surveyor 44 Lidar 44 LRAD 44 phased array 44 seabed 44 FLIR 43 periscope 43 infrared IR 43 spectrometers 43 warships 43 antennas 43 laser scanner 43 thermal imagers 43 Infra Red 43 navigation aids 43 remotely piloted aircraft 43 altimeter 43 seismometers 43 naval vessels 43 emergency locator transmitter 43 remote sensing satellites 43 gillnets 43 marine mammals 43 AMRAAM 43 unmanned 43 pilotless planes 43 imager 42 thermal imaging 42 navy ships 42 unmanned aircraft 42 reconnaissance aircraft 42 robotic spacecraft 42 nautical charts 42 sensor