Pepperday
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Merlin
Background to Merlin
German Merlin II Errata
Merlin II main program
Merlin II manual
Merlin II - PC-1248 tech info
Merlin Program
Merlin update to 2030
Other Navigation
Steer Clear of the Great Circle
That 1421 nonsense
The Nautical Almanac's Faulty Calculator Instructions
The Two-body Fix At Sea
Sailing
1. Winter Cruise
2. Inside Passage
3. Zuytdorp Challenge
4. Speeding
Other navigation
Articles on navigation at sea.