Question

9

Ptolemy's Geography is the magnetic compass allowed sailors to determine their
direction and position on the open sea.
True or False

Answer 1

False

Step-by-step explanation:

The compass can be used for direction on the open sea, but astronomy must be used for determining position. Longitude is the most difficult coordinate to determine on the open sea, as it depends on an accurate time reference.

These days, of course, satellite references can be used for position to nearly centimeter accuracy.

A magnetic compass cannot be used to determine position on the open sea.