1594 ⟶ Backstaff Invention by John Davis
Backstaff: Invented by Captain John Davis.
Year
1594
1761
1775
1904
🧭 Backstaff Invention by John Davis
Backstaff: Invented by Captain John Davis.⟶
NavigationExplorationMaritime HistoryAge of Discovery
United Kingdom⏱️ Harrison's Chronometer Solves Longitude Problem
The problem of longitude was finally resolved by the fourth chronometer of John Harrison⟶
NavigationMaritime HistoryScientific InnovationExplorationAge of ExplorationMeasurement
United Kingdom🧭 John Harrison Completes Marine Chronometer
Marine chronometer invented.⟶
NavigationMaritime HistoryScientific RevolutionExplorationClockmakingAge of DiscoveryPrecision Engineering
United Kingdom🧭 Cook's Second Voyage Utilizes Harrison and Kendall Chronometers for Navigation
John Harrison H4 and Larcum Kendall K1 marine chronometers are used to measure longitude by James Cook on his second voyage (1772–1775).⟶
ExplorationNavigationMaritime HistoryScientific InstrumentsJames CookAge of Exploration
United Kingdom💡 Fleming Valve (Vacuum Tube) Invention
The Fleming valve, the first vacuum tube and diode, is invented by John Ambrose Fleming.⟶
ElectronicsRadioTelecommunications
United Kingdom