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gptkbp:instance_of
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gptkb:clock_tower
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gptkbp:academic_programs
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spring-driven
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gptkbp:associated_with
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John Harrison's legacy
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gptkbp:constructed_in
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gptkb:John_Harrison_XX
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gptkbp:contributed_to
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gptkb:navigation_system
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gptkbp:cultural_impact
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improved navigation at sea
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gptkbp:cultural_references
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often referenced in discussions of timekeeping history
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gptkbp:design
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functional aesthetics
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gptkbp:design_features
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multiple dials
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gptkbp:dimensions
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1.5 m x 1.2 m x 0.5 m
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gptkbp:economic_impact
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set a precedent for accuracy in timekeeping
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gptkbp:exemplifies
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precision engineering
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gptkbp:exhibited_at
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gptkb:Greenwich_Observatory
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gptkbp:exhibition
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gptkb:National_Maritime_Museum
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gptkbp:features
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temperature compensation
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gptkbp:first_introduced
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in the Atlantic Ocean
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gptkbp:historical_context
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Age of Enlightenment
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gptkbp:historical_documentation
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described in various historical texts
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gptkbp:historical_impact
|
revolutionized maritime navigation
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gptkbp:historical_period
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gptkb:18th_century
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gptkbp:historical_significance
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solved the problem of determining longitude at sea
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|
https://www.w3.org/2000/01/rdf-schema#label
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John Harrison XI
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gptkbp:influenced
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horology
subsequent marine timekeeping devices
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gptkbp:influenced_by
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scientific advancements of the time
previous marine clocks
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gptkbp:innovation
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innovative use of materials
advanced clockmaking techniques
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gptkbp:inspired
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future inventors of timekeeping devices
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gptkbp:inspired_by
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Harrison's earlier clocks
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gptkbp:invention
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gptkb:John_Harrison_XX
not patented
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gptkbp:is_celebrated_in
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maritime history
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gptkbp:legacy
|
set standards for future chronometers
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gptkbp:location
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gptkb:Royal_Observatory,_Greenwich
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gptkbp:material
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brass
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gptkbp:mechanism_of_action
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gptkb:Pendulum
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gptkbp:notable_achievement
|
accurate timekeeping at sea
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gptkbp:notable_comparison
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compared to modern chronometers
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gptkbp:notable_feature
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self-winding mechanism
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gptkbp:notable_users
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gptkb:explorers
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gptkbp:performance
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within one second per day
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gptkbp:purpose
|
marine timekeeping
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gptkbp:recognition
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widely regarded as a masterpiece
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gptkbp:recognized_by
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gptkb:Royal_Society
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gptkbp:related_to
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longitude problem
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gptkbp:significance
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first successful marine chronometer
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gptkbp:successor
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gptkb:Harrison's_H4
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gptkbp:used_in
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gptkb:British_Royal_Navy
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gptkbp:weight
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approximately 32 kg
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gptkbp:year
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1759
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gptkbp:bfsParent
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gptkb:John_Harrison_XX
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gptkbp:bfsLayer
|
4
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