Chronometers in a sentence

Back in the 19th century, a cannon was fired at 1pm precisely in Newcastle Harbour to allow sea captains to adjust their ship chronometers to enable more accurate navigation while at sea in those far away days before satellites and modern GPS.

All chronometers and watches should be checked regularly with a radio time signal.

Borda was a mariner and a scientist, spending time in the Caribbean testing out advances in chronometers.

Chronometers or telegraphy was used to synchronize these clocks.sfn Standard time zones of the world since 2015.

Finally, the combination of the availability of marine chronometers and wireless telegraph time signals put an end to the use of lunars in the 20th century.

Gould wrote The Marine Chronometer published in 1923, which covered the history of chronometers from the Middle Ages through to the 1920s, and which included detailed descriptions of Harrison's work and the subsequent evolution of the chronometer.

Initially, the cost of these chronometers was quite high (roughly 30% of a ship's cost).

In total, Harrison received £23,065 for his work on chronometers.

Longitude could only be reckoned crudely as accurate chronometers were available until the late 18th century.

Longitude could only be reckoned crudely as accurate chronometers were unavailable until the late 18th century.

Nonetheless, for many years even towards the end of the 18th century, chronometers were expensive rarities, as their adoption and use proceeded slowly due to the precision manufacturing necessary and hence high expense.

Spring-driven chronometers must be wound at about the same time each day.

The 1826 experiment was aborted by the flooding of the mine, but in 1854 he conducted an improved experiment at the Harton coal mine, using seconds pendulums swinging on agate plates, timed by precision chronometers synchronized by an electrical circuit.

The expiry of Arnold's patents at the end of the 1790s enabled many other watchmakers including Thomas Earnshaw to produce chronometers in greater quantities at less cost even than those of Arnold.

The sensor operator console seats four and has all the equipment listed above plus camera bay heating control, chronometers, emergency oxygen, interphone and individual lighting.

Though the Board of Longitude rewarded John Harrison for his marine chronometer in 1773, chronometers remained very expensive and the lunar distance method continued to be used for decades.

Time was also "sold" to the railroads and was used in conjunction with railroad chronometers to schedule American rail transport.