Related by context. Frequent words. (Click for all words.) 56 seismometers 54 sonars 52 tide gauges 52 longlines 51 seismographs 51 sonar 49 seismometer 49 buoys 49 Transmitters 49 radio transmitters 47 infrasound 47 geophones 47 oceanographic 46 autonomous underwater 46 AUVs 45 sperm whales 45 oceanographers 45 transmitters 44 beaked whales 44 dorsal fins 44 transmitter 44 sediment cores 44 multispectral 43 Aegis radar 43 hydrographic 43 temperature salinity 43 Aegis destroyers 43 VHF radio 43 humpbacks 43 telemetry 43 VHF 43 seabed 42 NIWA 42 geostationary satellites 42 humpback whales 42 dolphins 42 whales 42 ROV 42 whale 42 Humpback whales 42 EPIRB 42 longline 42 baited hooks 41 bottlenose dolphins 41 squid 41 distress beacon 41 baleen whales 41 echolocation 41 scan sonar 41 seafloor 41 leatherback turtles 41 Marine Biology 40 instrumentation 40 humpback whale 40 porpoises 40 optical telescopes 40 elephant seals 40 marine mammals 40 humpback 40 cetacean 40 AUV 40 orbiting spacecraft 40 acoustic instruments 40 microphones 40 infrared spectrometer 40 orbiting satellites 40 NOAA 39 decoys 39 Microphones 39 ROVs 39 Oceanography 39 transducers 39 FleetBroadband 39 manta rays 39 seismograph 39 submersibles 39 Transmitter 39 seamounts 39 transducer 39 ultrasonic 39 buoy 39 frequencies 39 spectrometers 39 CALIPSO 39 liferaft 39 PowerBuoy 39 sensors 38 undersea warfare 38 Radio Frequency RF 38 directionality 38 radars 38 satellites 38 beeps 38 downriggers 38 Telemetry 38 monaural 38 oceanic 38 ocean 38 Global Positioning System 38 underwater 38 Oceanographic