Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
marine chronometer
|
| gptkbp:accuracy |
within 5 seconds over 81 days
|
| gptkbp:awardedBy |
gptkb:Board_of_Longitude
|
| gptkbp:diameter |
13 cm
|
| gptkbp:displayedAt |
gptkb:Royal_Observatory,_Greenwich
|
| https://www.w3.org/2000/01/rdf-schema#label |
H4 chronometer
|
| gptkbp:influenced |
development of marine navigation
|
| gptkbp:inventedBy |
gptkb:John_Harrison
|
| gptkbp:location |
gptkb:Royal_Observatory,_Greenwich
|
| gptkbp:material |
brass
|
| gptkbp:purpose |
solving the longitude problem
|
| gptkbp:significance |
first successful marine timekeeper
|
| gptkbp:testVoyage |
Deptford to Jamaica
|
| gptkbp:type |
portable timekeeper
|
| gptkbp:weight |
1.45 kg
|
| gptkbp:yearCompleted |
1761
|
| gptkbp:bfsParent |
gptkb:Marine_Chronometer
|
| gptkbp:bfsLayer |
7
|