Skip to content
Home
People
Places
Science
History
Culture
More
▾
Science & Space
Space
Technology
Natural World
Historical Figures
Inventions
Discoveries
Geography
ع
文A
Home
›
H3
H
Object
H3
1 article
2 relations
Articles about H3
Marine Chronometer
A marine chronometer is a precision timekeeper accurate enough to be used as a portable reference for finding longitude at sea. The problem was urgent by the early eighteenth century, and in 1714 the British Parliament offered a £ 20,000 reward for a practical…
Relationship graph
J
John Harrison
built by
›
J
John Harrison
developed by
›
Explore related
J
John Harrison
Person
2
B
Board of Longitude
Institution
2
H
H4
Object
2
H
H1
Object
2
J
John Arnold
Person
2
J
James Cook
Person
1
J
Jamaica
Place
1
G
Greenwich
Place
1
Marine ChronometerA marine chronometer is a precision timekeeper accurate enough to be used as a portable reference for finding longitude at sea. The problem was urgent by the early eighteenth century, and in 1714 the British Parliament offered a £ 20,000 reward for a practical…