marine chronometer
Seafaring precision clock
A marine chronometer is a precision timekeeping instrument designed for use at sea, historically essential for determining longitude during navigation.
Unlike ordinary clocks, marine chronometers maintain accuracy despite the motion and temperature changes aboard ships.
The captain consulted the marine chronometer to fix their position.
Though largely replaced by GPS, they remain aboard many vessels as backup instruments.
Tick-controlling clock component
- balance wheelTimekeeping oscillator in watches
- gimbalsSelf-leveling pivot mechanism
- hairspringCoiled timing regulator
- mainspringClock's power coil
Certain presidential surname
- ArnoldMasculine Germanic name
- watchmakerTimepiece crafter and repairer
- clockmakerTimepiece craftsman
- H2Water molecule symbol
Kendall · K1 · chronometry · timekeeping · horological · guild · apprentice · masterpiece
Maritime angular measurement device
- chartData shown visually
- voyageJourney by sea
- compassDevice showing cardinal directions
- bearingPosture or orientation
course · pilotage · waypoint · celestial navigation · dead reckoning · nautical almanac · azimuth · horizon
Pole-to-pole great circle
- GreenwichLondon district, meridian origin
- prime meridianZero-degree longitude line
- coordinatesLocation-specifying number pairs
- latitudeGeographic or personal freedom
cartography · dead reckoning · celestial navigation · sea trials · Jamaica · Barbados
Seagoing transport vessel
- voyageJourney by sea
- oceanMassive saltwater body
- captainOne who commands
- quarterdeckShip's elevated aft platform
chart room · navigator · Royal Navy · East India Company · Admiralty · clipper · man-of-war · circumnavigation
Degree of correctness
- calibrationAdjusting for measurement accuracy
- rateMeasured speed or charge
- gainingObtaining or increasing
- losingFailing to win
stability · certification · mean time · daily rate · adjustment · bimetallic · detent · impulse
escapement
Tick-controlling clock component
- balance wheelTimekeeping oscillator in watches
- gimbalsSelf-leveling pivot mechanism
- hairspringCoiled timing regulator
mainspring · fusee · jewels · brass · dial · winding · power reserve
Harrison
Certain presidential surname
- ArnoldMasculine Germanic name
- watchmakerTimepiece crafter and repairer
- clockmakerTimepiece craftsman
Kendall · H2 · K1 · chronometry · timekeeping · horological · guild · apprentice · masterpiece
sextant
Maritime angular measurement device
bearing · course · pilotage · waypoint · celestial navigation · dead reckoning · nautical almanac · azimuth · horizon · landfall
meridian
Pole-to-pole great circle
- GreenwichLondon district, meridian origin
- prime meridianZero-degree longitude line
- coordinatesLocation-specifying number pairs
latitude · cartography · dead reckoning · celestial navigation · sea trials · Jamaica · Barbados
ship
Seagoing transport vessel
quarterdeck · chart room · navigator · Royal Navy · East India Company · Admiralty · clipper · man-of-war · circumnavigation · trade routes
accuracy
Degree of correctness
- calibrationAdjusting for measurement accuracy
- rateMeasured speed or charge
- gainingObtaining or increasing
losing · stability · certification · mean time · daily rate · adjustment · bimetallic · detent · impulse
- timekeepingclock, watch, watches, clocks, timer
- clocksdigital clock, wall clock, quartz clock, analog clock, grandfather clock
- seafaringship, sailors, ships, sail, sailor
- timepiecesclock, wristwatch, pocket watch, stopwatch, wall clock
- Georgian Inventionsspinning jenny, cotton gin, steam engine, power loom, flying shuttle
- chronometersbalance wheel, mainspring, escapement
marine chronometersundial
Shadow-based timekeeper
hourglass · water clock · cuckoo clock · egg timer · pendulum clock
marine, marina, submarine, maritime, marinate, mariner, marinade, marauder, aquamarine