astrolabe
astronavigation
azimuth circle
azimuth compass
bevel
bevel protractor
bevel square
celestial navigation
chronometer
clinometer
coastwise navigation
consolan
crescent
dead reckoning
fix
goniometer
graphometer
half circle
hemicycle
line of position
loran
pantometer
pilotage
plane sailing
point-to-point navigation
protractor
quadrant
radar
radio beacon
radio navigation
radiogoniometer
sector
semicircle
shoran
sofar
sonar
tables
theodolite
transit
transit circle
transit instrument
transit theodolite
angular unit
altimeter
barometer
compass
hogleg
pedometer
refractor
spyglass
tangler