astronavigation
bathometry
bathymetry
celestial navigation
chronometer
coastwise navigation
consolan
dead reckoning
depth sounding
echo sounding
echolocation
fathomage
fathoming
fix
line of position
loran
oceanography
pilotage
plane sailing
point-to-point navigation
radar
radio beacon
radio navigation
sextant
shoran
sofar
sounding
soundings
tables
water
measuring device
measuring instrument
measuring system
navigational instrument
acoustic
analog
audio
comm
directional
infrared
laser
long-range
microwave
navigational
optical
radio-
scanner
seismic
sensor
sonic
subspace
telemetry
transporter
ultrasonic
visual