Big Ben
astronavigation
celestial navigation
clock
clock movement
clockworks
coastwise navigation
consolan
dead reckoning
fix
horologe
horologium
line of position
loran
metronome
pilotage
plane sailing
point-to-point navigation
radar
radio beacon
radio navigation
sextant
shoran
sofar
sonar
tables
ticker
timekeeper
timepiece
timer
turnip
watch
watchworks
altimeter
barometer
binoculars
chron
chronograph
communicator
compass
intercom
readout
speedometer
spyglass
thermometer
wristwatch