People of Surveying
Surveying Across the Seas, Part 2: John Harrison and the Clock That Carried Longitude
How John Harrison’s marine timekeepers turned reference time into a practical east-west position at sea.
From the Index
Tag: Longitude
Reports, histories, and working notes filed under this subject.
Exploration & Places
Surveying Across the Seas, Part 1: Before Longitude
How latitude, dead reckoning, soundings, and disciplined observation guided sailors before dependable longitude.