A system for determining longitude was finally perfected by the use of charts and a(n)
A)astrolabe.
B)telescope.
C)chronometer.
D)solar timepiece.
E)magnetized compass.

Question

Quizplus · Accepted Answer

The system for determining longitude using charts and a chronometer was developed by John Harrison in the 18th century. The use of an accurate chronometer allowed sailors to determine their longitude by comparing the local time with the time at a known location, as shown on a nautical chart. This method was much more reliable than earlier methods such as using celestial navigation with an astrolabe or a telescope. Solar timepieces were not accurate enough for measuring longitude, and magnetized compasses were used for determining direction but not longitude.

A System for Determining Longitude Was Finally Perfected by the Use