Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:marine_chronometer
|
| gptkbp:completedIn |
1757
|
| gptkbp:countryOfOrigin |
gptkb:England
|
| gptkbp:displayedAt |
gptkb:Royal_Observatory,_Greenwich
|
| gptkbp:feature |
bimetallic strip
remontoire caged roller bearings |
| gptkbp:inventedBy |
gptkb:John_Harrison
|
| gptkbp:location |
gptkb:Royal_Observatory,_Greenwich
|
| gptkbp:material |
brass
|
| gptkbp:predecessor |
gptkb:Harrison's_H2_clock
|
| gptkbp:purpose |
solving the longitude problem
|
| gptkbp:significance |
improved accuracy for marine navigation
|
| gptkbp:successor |
Harrison's H4 watch
|
| gptkbp:weight |
60 pounds
|
| gptkbp:bfsParent |
gptkb:John_Harrison's_grasshopper_escapement
|
| gptkbp:bfsLayer |
8
|
| https://www.w3.org/2000/01/rdf-schema#label |
Harrison's H3 clock
|