Related by context. Frequent words. (Click for all words.) 51 VHF 47 GPS satellites 46 navigational aids 46 navigation aids 45 VHF radio 44 Iridium satellite 44 GPS 44 beacons 43 Global Positioning System 43 satellite constellation 42 NOAA 41 orbiting satellites 41 shortwave 41 transmitters 41 TDMA 41 antennas 41 transmitter 41 analog signals 41 navigational 41 handheld radios 40 iDEN network 40 WAAS 40 GLONASS 40 radios 39 satellites 39 analog broadcasts 39 radars 39 QuikScat 39 Doppler radar 39 datalink 39 EPIRB 38 lighthouse 38 GPS receiver 38 ham radio 38 analog TVs 38 positioning satellites 38 repeater 38 EGNOS 38 satellite 38 Glonass 38 buoys 37 ultra wideband 37 Magnuson Stevens Act 37 analog 37 satcom 37 SBIRS 37 converter boxes 37 SATCOM 37 JTRS 37 repeaters 37 VOR 36 Global Positioning Satellite 36 Transmitter 36 lighthouses 36 decommissioned 36 Marine Protected Areas 36 modems 36 NMEA 36 UHF 36 Transmitters 35 ARPANET 35 Globalstar 35 sonar 35 Coast Guard 35 uplinks 35 Warning System 35 antenna 35 wireless 35 Iridium 35 beacon 35 NPOESS 35 Pitot tubes 35 narrowband 35 radio frequencies 35 MHz frequency 35 frequency hopping 34 Satcom 34 NOAA Weather 34 megahertz 34 digital tuners 34 GPS Global Positioning 34 GSM GPRS 34 GSM EDGE 34 mariners 34 IBOC 34 overfished 34 backhaul 34 emergency beacons 34 radio transmitters 34 GNSS 34 transponder 34 RTTY 34 recreational boaters 34 digital converter boxes 34 multiband 34 multicasting 34 Multipoint 34 Assisted GPS 34 altimeter 33 UAVs 33 National Oceanic