Because of the technology advancement, now there are extensive navigation and radio equipments available on board ships. Below is the list of some of them found on the typical vessel:

Navigation Equipment:
Magnetic Compass, GPS Navigator, Radar with Arpa, S-Band, Radar with Arpa, X-Band, Doppler Speed Log, Auto Pilot 1 Gyro Compass, Weather Facsimile, ECHO Sounder, Anemometer, Rudder Angle Indicator, Whistle System, ZET-horn type 131 C, Navtex Receiver

Radio Equipment:
GMDSS Radio Equipment, VHF Radio Telephone, Two Way VHF Transceiver, EPIRB, Inmarsat-B, Inmarsat-C, UHF Transeiver, Radar Transponder

If you who have used any navigational or radio equipment which you think needs special recognition then post your findings here. Also if you know something important about above equipments, you are most welcome to post that as well.