Aurore After having tackled the building of a marine watch in 1756, Pierre Le Roy, 50 years old, has reached a new step last year. It is...

Sumner's Manual Captain Thomas Hubbard Sumner publishes a New and Accurate Method of Finding a Ship’s Position at Sea . This is the fruit...

Captain Thomas Hubbard Sumner, 30 years old, commanding the sailing ship Cabot , travelling from Charleston, Virginia, to Greenock,...

Harrison's Chronometer H1 John Harrison, 46 years old, trials his first marine chronometer H1, built last year, on a round trip between...

John Hadley John Hadley, a mathematician aged 49, presents a new instrument of navigation, the octant, also known as the reflecting...

Joachim d’Alencé, an astronomer, publishes the first release of an annual ephemeris, the ‘ Connoissance des Temps' .   He has worked   on...

Tobias Mayer Tobias Mayer, a German astronomer aged 29, publishes Tabulæ motuum Solis et Lunæ novæ et correctæ, that are tables of the...

Isaac Newton The Longitude Act is passed by   the Parliament ‘ for providing a Publick Reward for such Person or Persons as shall...

On the 11th of May, thirteen French warships run aground on the reefs of an isolated small archipelago in the West Indies. This is the...