And no, a sextant doesn't only work on a flat object it uses the horizon on Earth.
SEXTANTS ARE DESIGNED to be USED
TO FIND LONGITUDE and LATITUDE.
Which is why they have build-in error of a couple of kilometers.
Every word you wrote
was UTTERLY wrong.
"Sextant"
"The sextant was designed to find longitude by measuring the angular distance between the moon and a nearby star."
"It was also used on land and to find latitude, at sea."
And no, a sextant doesn't only work on a flat object it uses the horizon on Earth.
SEXTANTS ARE USED TO FIND LONGITUDE and LATITUDE.
Which is why sextants have build-in error of a couple of kilometers.
Every word you wrote
was UTTERLY wrong.
"Sextant
The sextant was designed to find longitude by measuring the angular distance between the moon and a nearby star.
It was also used on land and to find latitude, at sea."