A typical coordinate is given as
68 35 067 N 123 54 817 W.
I thought maybe some old timers could help me out. The author says in his report of the time that they were using a GPS, but I contacted him and he doesn’t remember any of the details. The points can be located on a map using the first two pairs of two digits, so I’m pretty sure it’s degrees minutes, but the last three digits don’t make sense. Since some are greater than 600 it’s not seconds with another significant figure, i.e, a missing decimal point.
Any ideas? I’m thinking there was some “convention” early in the personal GPS receiver days. The original information is scattered throughout the text at http://traditionalarctickayaks.com/horton_trip_journal.htm
I'd like to use his info but without knowing how to interpret the last three digits I'm left with a ±2km precision.