The warrant for the first Astronomer Royal appointed in England, 4 March 1675, stated what as the purpose of the office?

Question

In 1750 French astronomer Nicolas-Louis de Lacaille set up an observatory in Table Bay, Cape of Good Hope, where he did what?

Answer 1

To find "the longitude of places" in order to perfect navigation
The 1675 warrant stated the task of "The King's Astronomical Observator" as "rectifieing the Tables of the motions of the Heavens, and the places of the fixed stars, so as to find out the so much desired Longitude of places for Perfecteing the Art of Navigation". The Royal Astronomy at Greenwich was built for the work. Later, in 1818, the Royal Observatory was given the task of maintaining the Royal Navy chronometers.