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Clock used on ships to aid in navigation
A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation
Marine_chronometer
Topics referred to by the same term
Look up chronometer or chronoscope in Wiktionary, the free dictionary. Chronometer is a name for certain types of clock. It may refer to: Chronomètre of
Chronometer
High-precision time piece
marked as Certified Chronometer or Officially Certified Chronometer. Outside Switzerland, equivalent bodies, such as the Japan Chronometer Inspection Institute
Chronometer_watch
English clockmaker (1693–1776)
March 1776) was an English joiner and clockmaker who invented the marine chronometer, a long-sought device for solving the problem of how to calculate longitude
John_Harrison
Navigational method
Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during
Longitude_by_chronometer
An observatory chronometer is a timepiece that has passed stringent testing and a slate of accuracy tests. Thus, the "observatory trial" developed as
Observatory_chronometer
Chronometers were formerly used for the accurate determination of longitude by ships at sea. By measuring the time of local solar noon compared to the
List of chronometers on HMS Beagle
List_of_chronometers_on_HMS_Beagle
Swiss watch manufacturer
participate in domestically mass-producing chronometers. Hamilton was provided with two Swiss Ulysse Nardin marine chronometers to examine. Hamilton successfully
Hamilton_Watch_Company
Timepiece used in operation of trains
A railroad chronometer or railroad standard watch is a specialized timepiece that once was crucial for safe and correct operation of trains in many countries
Railroad_chronometer
British chronometer company
Thomas Mercer Chronometers is a British company specialising in the design and production of bespoke chronometers. The story begins with John Harrison
Thomas_Mercer_Chronometers
1974 quartz wristwatch
The Omega Marine Chronometer was the first quartz wristwatch ever to be awarded certified status as a marine chronometer. The watch was made by Omega
Omega_Marine_Chronometer
Instrument for measuring, keeping or indicating time
A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals
Clock
Institute for testing Swiss watches
Contrôle officiel suisse des Chronomètres (COSC), the Official Swiss Chronometer Testing Institute, is the institute responsible for certifying the accuracy
COSC
A nautical chronometer made by Thomas Earnshaw (1749–1828), and once part of the equipment of HMS Beagle, the ship that carried Charles Darwin on his
Ship's chronometer from HMS Beagle
Ship's_chronometer_from_HMS_Beagle
Music timing device
The chronomètre is a precursor of the metronome. It was invented circa 1694 by Étienne Loulié to record the preferred tempo of pieces of music. Musician
Chronomètre_of_Loulié
English watchmaker (1790-1853)
famous English watchmaker noted for his highly accurate clocks and marine chronometers. He founded the Dent company. Edward John Dent, son of John and Elizabeth
Edward_John_Dent
Mechanism for regulating the speed of clocks
in tower clocks.[citation needed] The detent or chronometer escapement was used in marine chronometers, although some precision watches during the 18th
Escapement
Swiss watch company
Switzerland for almost 40 years. The company was initially called Vacuum Chronometer Corp., which manufactured vacuum watches (sold under several well-known
Century_Time_Gems
Process of monitoring and controlling the movement of a craft or vehicle
between GMT and chronometer time is carefully determined and applied as a correction to all chronometer readings. Spring-driven chronometers must be wound
Navigation
Record of humanity's attempts to find east-west position on Earth
with great accuracy, such as eclipses, and building clocks, known as chronometers, that could keep time with sufficient accuracy while being transported
History_of_longitude
18th and 19th-century British watchmaker
John Arnold's earlier work, further simplified the process of marine chronometer production, making them available to the general public. He is also known
Thomas_Earnshaw
East-West geographic coordinate
Maskelyne; and for the chronometers developed by the Yorkshire carpenter and clock-maker John Harrison. Harrison built five chronometers over more than three
Longitude
was a pocket chronometer of particularly good performance. Arnold's advantage as a manufacturer was that he was able to produce chronometers in quantity
Navigation and seamanship of James Cook
Navigation_and_seamanship_of_James_Cook
Wristwatch manufactured by Rolex
Datejust is a self-winding chronometer manufactured by Rolex. Launched in 1945, the Datejust was the first self-winding chronometer wristwatch to indicate
Rolex_Datejust
Swiss manufacturer of mechanical watches
15 sec/day Chronometer – COSC-certified Chronometer, meaning it meets the strict accuracy standards set by the Official Swiss Chronometer Testing Institute
Sellita
American whaler
marine chronometer by Adams. The K2 was the third precision marine chronometer made after the H4, designed by John Harrison. The chronometer was taken
Mayhew_Folger
British watchmaker (1719–1790)
for John Harrison, who later used ideas from pocket watches in his H4 chronometer. Kendall set up his own business in 1742, working with Thomas Mudge to
Larcum_Kendall
COSC certified, self-winding chronometer manufactured by Rolex
The Rolex Oyster Perpetual Day-Date is a COSC certified, self-winding chronometer manufactured by Rolex. Initially presented in 1956, the Day-Date was
Rolex_Day-Date
Brand of Russian wristwatches
first wristwatches under the brand name "Pobeda" and the first marine chronometers and hack watches or deck watches were produced. By 1951 the production
Poljot
Type of watch
century, before eventually being broken in 1916, after which standard chronometer frequencies returned to present-day levels (generally 5–10 Hz, or 18
Chronograph
(1747–1806), English chronometer maker, London, pocket and marine chronometer. George Margetts (1748–1808), English chronometer maker, London, pocket
List_of_watchmakers
Former London manufacturer of luxury clocks and watches
Dent's chronometers. Dent's chronometers accompanied some of the 19th century's most influential explorers. Robert FitzRoy took Dent chronometer no. 633
Dent_(watchmaker)
by Pulsar. In 1974 the Omega Marine Chronometer was introduced, the first wrist watch to hold Marine Chronometer certification, and accurate to 12 seconds
History_of_watches
Method for increasing reliability
triple modular redundancy, a ship must have at least three chronometers; two chronometers provided dual modular redundancy, allowing a backup if one should
Triple_modular_redundancy
Angular distance between the Moon and another celestial body
1763 and used until about 1850 when it was superseded by the marine chronometer. A similar method uses the positions of the Galilean moons of Jupiter
Lunar_distance_(navigation)
Technique used to date materials such as rocks or carbon
129 Xe with a half-life of 16.14±0.12 million years. The iodine-xenon chronometer is an isochron technique. Samples are exposed to neutrons in a nuclear
Radiometric_dating
1995 popular science book
John Harrison, an 18th-century clockmaker who created the first clock (chronometer) sufficiently accurate to be used to determine longitude at sea—an important
Longitude_(book)
English horologist
continuously trading firm of chronometer manufacturers in the world. In January 2018, the firm launched a new chronometer wristwatch, after sixteen years
Charles_Frodsham
Type of mechanical watch
synchronized with the ship's marine chronometer. The use of a hack watch makes it easier to take sights, as the chronometer is normally in a fixed position
Hack_watch
Alias for the UTC+00:00 time zone
into an advanced maritime nation, British mariners kept at least one chronometer on GMT to calculate their longitude from the Greenwich meridian, which
Greenwich_Mean_Time
Navigation using astronomical objects to determine position
accurate the fix; – indeed, every four seconds of time source (commonly a chronometer or, in aircraft, an accurate "hack watch") error can lead to a positional
Celestial_navigation
Clock type
quartz watches are chronometer-certified by the COSC. These COSC chronometer-certified movements can be used as marine chronometers to determine longitude
Quartz_clock
Swiss watch company
daily variation of ±15 seconds. The Chronometer grade must meet strict standards prescribed by the COSC. Chronometer grade movements are serial numbered
ETA_SA
English instrument maker
inventor of the marine chronometer. He was born in Barrow-upon-Humber but moved to London to assist his father in developing the chronometer. In 1761 he sailed
William Harrison (instrument maker)
William_Harrison_(instrument_maker)
German luxury watch brand
include an up/down power reserve indicator (patent No. 9349), improved chronometer restraints, pocket watch with minutes counter, and addition of beryllium
A._Lange_&_Söhne
Swiss luxury watchmaking company
Switzerland. The company became known for manufacturing highly accurate marine chronometers and complicated precision exclusive timepieces used by over 50 of the
Ulysse_Nardin
Time measuring device
timekeeping technology used in alarm clocks, kitchen timers, stopwatches, chronometers, time-controlled appliances like washing machines, bank vault time locks
Balance_wheel
2000 British docudrama miniseries
Longitude presents the story of Harrison's efforts to develop the marine chronometer and thereby win the Longitude prize in the 18th century. This is interwoven
Longitude_(TV_series)
Harrison built a succession of accurate timepieces, introducing the term chronometer. The electric clock, invented in 1840, was used to control the most accurate
History of timekeeping devices
History_of_timekeeping_devices
18th-century French clockmaker
Roy chronometer, 1766, Musée des Arts et Métiers Pierre Le Roy chronometer, 1766 Pierre Le Roy chronometer mechanism Plans of Le Roy chronometer He was
Pierre_Le_Roy
Streamlined body for generating lift
Inclined plane Lever Pulley Screw Wedge Wheel and axle Clocks Atomic clock Chronometer Pendulum clock Quartz clock Compressors and pumps Archimedes' screw Eductor-jet
Airfoil
Italian physicist and astronomer (1564–1642)
problem eventually required the development of a practical portable marine chronometer, such as that of John Harrison. Late in his life, when totally blind
Galileo_Galilei
Spring attached to the balance wheel in timepieces
every portable timekeeping device: alarm clocks, kitchen timers, marine chronometers, time-controlled appliances like washing machines, bank vault time locks
Balance_spring
English watchmaker and inventor
watch that was both practical and accurate, and also brought the term "chronometer" into use in its modern sense, meaning a precision timekeeper. His technical
John_Arnold_(watchmaker)
German watch manufacturer
largest watch factory in the world and in 1956 it was the third largest chronometer manufacturer right behind Rolex and Omega. The company is owned by businessman
Junghans
Device to measure the passage of time
London. Not until the 18th century did John Harrison invent a marine chronometer that significantly improved on the stability of the hourglass at sea
Hourglass
Event causing a ship to wreck
techniques available—dead reckoning using the magnetic compass, the marine chronometer (to calculate longitude), a ship's logbook (which recorded the vessel's
Shipwrecking
British watchmaker
revenue of £40 million. All of their watches are either COSC or ISO chronometer rated and built in the United Kingdom. Bremont was founded by brothers
Bremont
Device only intended to turn itself off
Inclined plane Lever Pulley Screw Wedge Wheel and axle Clocks Atomic clock Chronometer Pendulum clock Quartz clock Compressors and pumps Archimedes' screw Eductor-jet
Useless_machine
1772–75 British maritime voyage
be found beyond the ice barrier. On this voyage the Larcum Kendall K1 chronometer was successfully employed by William Wales to calculate longitude. Wales
Second_voyage_of_James_Cook
Line of sports watches by Rolex
radium paint. The next wave of Submariners, the 5512 (chronometer version) and 5513 (non-chronometer), marked a significant change in the appearance of the
Rolex_Submariner
Swiss watchmaker
response, Rolex continued concentrating on its expensive mechanical chronometers where its expertise lay (though it did have some experimentation in quartz)
Omega_SA
Asteroid with an inclusion with high quantities of calcium and aluminium
radiometric datings of CAIs involved four samples examined through the Pb–Pb chronometer, yielding a weighted mean age of 4567.30 ± 0.16 Ma. Subsequent studies
Calcium–aluminium-rich inclusion
Calcium–aluminium-rich_inclusion
Time-signalling device
to allow navigators aboard nearby ships to synchronize their marine chronometers with a reference time standard controlling the ball. Time balls have
Time_ball
Pivoted support system
unacceptable. The rate of a mechanical marine chronometer is sensitive to its orientation. Because of this, chronometers were normally mounted on gimbals, in order
Gimbal
Meteorology institution in Hamburg, 1875–1945
department of coast meteorology and signal service; and a bureau for testing chronometers. It was dissolved in February 1875, and its responsibilities taken over
German_Maritime_Observatory
Observatory
error were much finer than any other standard, including the ISO 3159 chronometer standard that other testing bodies such as COSC use. Movements that passed
Besançon Astronomical Observatory
Besançon_Astronomical_Observatory
instruments, and holds collections of clocks and watches, marine and deck chronometers, automata, and related archives and documentation. In 1865 the Watchmaking
International Museum of Horology
International_Museum_of_Horology
Two-sided strip that coils when heated or cooled
Harrison, an eighteenth-century clockmaker who made it for his third marine chronometer (H3) of 1759 to compensate for temperature-induced changes in the balance
Bimetallic_strip
Personal timepiece
while a chronometer watch is a timepiece that has met an industry-standard test for performance under pre-defined conditions: a chronometer is a high
Watch
Line of mechanical diving watches
titular character, Bond wore an Omega Seamaster Professional Diver 300M Chronometer 2531.80.00. Before 1995, actors portraying James Bond wore a range of
Omega_Seamaster
Swiss watch manufacturer
certified chronometers. With 61,358 automatic movements produced in 2013, Mido is currently ranked number four in the production of chronometers in the Swiss
Mido_(watch)
Nautical instrument
compasses were important in the period before development of the reliable chronometers needed to determine a vessel's exact position from astronomical observations
Azimuth_compass
Machine that converts one or more forms of energy into mechanical energy (of motion)
Inclined plane Lever Pulley Screw Wedge Wheel and axle Clocks Atomic clock Chronometer Pendulum clock Quartz clock Compressors and pumps Archimedes' screw Eductor-jet
Engine
German jewelry company
are assembled in Glashutte, Germany. A majority of its timepieces are chronometer certified by Wempe at their Sternwarte observatory facility in Glashutte
Wempe
American businessman, manufacturer
businessman. He was well known for the manufacture and sale of maritime chronometers and nautical instruments in New York City under the name T.S. & J.D.
Thomas S. Negus (manufacturer)
Thomas_S._Negus_(manufacturer)
for a long time was believed to be the first to have coined the word "chronometer" for precise clocks designed to find longitude at sea, though an earlier
Jeremy_Thacker
1970s–80s watchmaking industry upheaval
Omega introduced the Omega Marine Chronometer, the first quartz watch ever to be certified as a marine chronometer, accurate to 12 seconds per year using
Quartz_crisis
Adage about conflicting sources of information
List of chronometers on HMS Beagle Church of St Anne (Shandon) § Clock, known as "the four-faced liar" Triple modular redundancy § Chronometers Bloch,
Segal's_law
Mechanism for regulating the speed of clocks
"Insight: Daniels' Co-Axial Escapement, an Evolution of the Fasoldt Chronometer". SJX Watches. SJX Watches. 2022-02-28. Retrieved 2023-11-22. "Insight:
Coaxial_escapement
Continuous progression from past to future
certain precision standards is called a chronometer. Initially, the term was used to refer to the marine chronometer, a timepiece used to determine longitude
Time
Phantom island in the North Atlantic
navigation was more difficult in this time (before more accurate marine chronometers), and it might have originated from a misidentification of the Faroe
Frisland
People that became famous after their death
English self-taught clockmaker and carpenter who invented the marine chronometer and was rewarded for it under the Longitude Act. During his lifetime
List of people who achieved posthumous recognition
List_of_people_who_achieved_posthumous_recognition
Observatory
from an observatory became known as an Observatory Chronometer, and such were issued a chronometer reference number by the Observatory. The role of the
Neuchâtel_Observatory
Manufacturer
Inclined plane Lever Pulley Screw Wedge Wheel and axle Clocks Atomic clock Chronometer Pendulum clock Quartz clock Compressors and pumps Archimedes' screw Eductor-jet
Fluid Equipment Development Company
Fluid_Equipment_Development_Company
British watch company
Johannes Jahnke. The SH21 featured a five-day power reserve and COSC chronometer certification. The release was described by industry observers as “probably
Christopher_Ward_(watchmaker)
Study of Earth's spatial information
was only part of the problem. John Harrison solved it by inventing the chronometer H-4 in 1760; later, in 1884, the International Meridian Conference adopted
Geography
Science of the measurement of time
clockwork, sundials, hourglasses, clepsydras, timers, time recorders, marine chronometers, and atomic clocks are all examples of instruments used to measure time
Chronometry
Swiss watchmaker founded by Hans Wilsdorf
reserve, and a silicon hairspring. It is the company's first METAS Master Chronometer timepiece, able to function within a tolerance range of 0/+5 seconds
Tudor_Watches
18th and 19th-century French horologist, watchmaker and scientist
exceptionally broad body of work, in particular in the field of marine chronometers. Ferdinand Berthoud was born on 18 March 1727, in Plancemont, Val-de-Travers
Ferdinand_Berthoud
English civil engineer and horologist
drawing room once housed the Ilbert Collection of clocks, watches, marine chronometers and sundials. He brought together the most important collection of watches
Courtenay_Adrian_Ilbert
English watch company
become principally a watch maker and, in the early 20th century, supplied chronometers and deck watches to the Royal Navy. Since the 1950s it has concentrated
Le_Cheminant
Dutch-born clockmaker and naval chronometer maker
1849) was a Dutch-born clockmaker and internationally renowned naval chronometer maker. He was particularly active in Altona, then part of Denmark but
Hendrik_Johan_Kessels
Decorative chronometer made of flowers
Decorative chronometer made of flowers
Floral_clock
Quality seal for watches made in Geneva
are defined according to the NIHS standard 95-11 ( a/k/a ISO 3159) for chronometers. 3 These bulletins are obtained through the Geneva office of COSC. The
Geneva_Seal
British explorer and naval officer (1728–1779)
they began carrying chronometers, because they used the lunar distance computations to evaluate the accuracy of the chronometers. On his second voyage
James_Cook
Tools used by navigators and pilots
Magnetic compass used to determine the magnetic heading of the ship. Marine chronometer used to determine time at the prime meridian with great precision which
Navigational_instrument
System of time measurement in Star Trek
point counts one-tenth of a day. This was demonstrated by the ship's chronometer in the TOS-Remastered episode, "The Naked Time," and by Captain Varley's
Stardate
Japanese manufacturing company
units. The watch was also the first chronometer-grade watch manufactured in Japan and was based on Seiko's own chronometer standard. Some Grand Seiko timepieces
Seiko
All Latin and Greek roots beginning with G
chronaxie, chronic, chronicle, chronogram, chronograph, chronology, chronometer, chronometry, chronophobia, chronophotography, chronostasis, geochronology
List of Greek and Latin roots in English/A–G
List_of_Greek_and_Latin_roots_in_English/A–G
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CHRONOMETER
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n.
An instrument for measuring time; a timekeeper.
a.
Pertaining to a chronometer; measured by a chronometer.
n.
A clock, watch, or other chronometer; a timepiece.
n.
A portable timekeeper, with a heavy compensation balance, and usually beating half seconds; -- intended to keep time with great accuracy for use an astronomical observations, in determining longitude, etc.
v. i.
A small timepiece, or chronometer, to be carried about the person, the machinery of which is moved by a spring.
n.
A clock, watch, or other instrument, to measure or show the progress of time; a chronometer.
n.
A contrivance for permitting a body to incline freely in all directions, or for suspending anything, as a barometer, ship's compass, chronometer, etc., so that it will remain plumb, or level, when its support is tipped, as by the rolling of a ship. It consists of a ring in which the body can turn on an axis through a diameter of the ring, while the ring itself is so pivoted to its support that it can turn about a diameter at right angles to the first.
n.
An allowance made for inaccuracy in an instrument; as, chronometer correction; compass correction.
n.
A metronome.
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