Larcum Kendall K1 chronometer

E221228

The Larcum Kendall K1 chronometer was an 18th-century marine timekeeper, closely modeled on John Harrison’s H4, that famously demonstrated the practicality of accurate longitude determination at sea.

All labels observed (2)

Label Occurrences
H4 marine timekeeper 1
Larcum Kendall K1 chronometer canonical 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf marine chronometer
timekeeping instrument
accuracy sufficient for reliable longitude calculation on long voyages
associatedWith Longitude Act
Royal Navy Pacific exploration program
surface form: Royal Navy exploration voyages
basedOn John Harrison
surface form: John Harrison H4 marine timekeeper
chronometerNumber K1
commissionedBy Board of Longitude
countryOfOrigin Kingdom of Great Britain
demonstrated practicality of accurate longitude determination at sea
designer Larcum Kendall
displayType analog
epochOfUse 1770s
era Age of Sail
escapementType detached escapement
field horology
navigation
function keep accurate time at sea
heritage derivative of Harrison H4 design
historicalRole transition from experimental to practical marine chronometers
influence development of later marine chronometers
inspiredBy John Harrison
locationOfCreation London, England
surface form: London
maker Larcum Kendall
materialUsed brass
steel
measurementQuantity time
measurementUnit hours
minutes
seconds
navigationProblemAddressed finding longitude at sea
notability one of the earliest successful marine chronometers
notableVoyage Second voyage of James Cook
powerSource spring-driven mechanism
purpose determination of longitude at sea
recognizedBy Board of Longitude
scientificSignificance key evidence in solving the longitude problem
status historical artifact
timePeriod 18th century
type pocket-watch style marine chronometer
usedBy James Cook
usedFor celestial navigation
longitude calculation
usedOnVessel HMS Resolution
voyageEndYear 1775
voyageStartYear 1772
yearCompleted 1770

How these facts were elicited

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Second voyage of James Cook usedInstrument Larcum Kendall K1 chronometer
John Harrison notableWork Larcum Kendall K1 chronometer
this entity surface form: H4 marine timekeeper