Join Date: Nov 2007
Location: SF Bay area
Thanked 6 Times in 5 Posts
Rep Power: 8
Actually when running along the coast you can use cell phone triangulation as a backup for GPS. Sort of like a short-range LORAN.
s/v Laelia - 1978 Pearson 365 ketch
s/v Essorant - 1972 Catalina 27