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gptkbp:instance_of
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gptkb:chronograph
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gptkbp:academic_programs
|
gear train
balance wheel
|
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gptkbp:associated_with
|
British naval history
John Harrison's legacy
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gptkbp:completed
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1761
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gptkbp:contributed_to
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global trade routes
safety of sea travel
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gptkbp:design
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circular case
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gptkbp:developed_by
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gptkb:England
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gptkbp:dimensions
|
6 inches in diameter
|
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gptkbp:exhibited_at
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gptkb:Royal_Observatory,_Greenwich
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gptkbp:features
|
temperature compensation
|
|
gptkbp:first_introduced
|
on HMS Centaur
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gptkbp:historical_context
|
gptkb:Age_of_Exploration
|
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gptkbp:historical_impact
|
advancement of maritime technology
|
|
gptkbp:historical_role
|
key in the development of longitude measurement
|
|
gptkbp:historical_significance
|
revolutionized maritime navigation
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|
https://www.w3.org/2000/01/rdf-schema#label
|
H4 chronometer
|
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gptkbp:influenced
|
timekeeping standards
navigation methods
time zone development
|
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gptkbp:influenced_by
|
previous marine timekeepers
|
|
gptkbp:innovation
|
improved accuracy over previous models
|
|
gptkbp:inspired
|
future chronometer designs
|
|
gptkbp:inspired_by
|
gptkb:astronomy
|
|
gptkbp:invention
|
gptkb:British_patent_1735
gptkb:John_Harrison_XX
1759
|
|
gptkbp:is_recognized_as
|
one of the first accurate timepieces for sea voyages
|
|
gptkbp:is_tested_for
|
gptkb:British_Admiralty
|
|
gptkbp:legacy
|
foundation for modern timekeeping at sea
|
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gptkbp:material
|
brass
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gptkbp:mechanism_of_action
|
mechanical escapement
|
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gptkbp:notable_achievement
|
won the Longitude Prize
|
|
gptkbp:notable_feature
|
self-winding mechanism
|
|
gptkbp:notable_users
|
explorers and sailors
|
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gptkbp:part_of
|
gptkb:Harrison's_series_of_chronometers
|
|
gptkbp:performance
|
within seconds per day
|
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gptkbp:purpose
|
determining longitude at sea
|
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gptkbp:recognized_by
|
gptkb:scientific_community
|
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gptkbp:related_to
|
gptkb:navigation_system
|
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gptkbp:replaced_by
|
chronometer watches
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gptkbp:setting_time
|
accurate timekeeping at sea
|
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gptkbp:significance
|
solved the problem of the longitude at sea
|
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gptkbp:successor
|
H5 chronometer
|
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gptkbp:used_by
|
gptkb:navigation
|
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gptkbp:used_for
|
determining longitude at sea
|
|
gptkbp:used_in
|
gptkb:naval_warfare
maritime expeditions
|
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gptkbp:weight
|
approximately 1.5 kg
|
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gptkbp:bfsParent
|
gptkb:John_Harrison_XX
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gptkbp:bfsLayer
|
4
|