The map says 33 38.33. This is DD MM.MM, not DD MM SS. If you want DD MM SSS for your chartplotter, then it is 33D 38M 20S (.33M x 60S/D=20S). If you need a third digit or tenths of a second, add a zero for 20.0S. For the longitude, it will be 118D 03M 06.6S.
Sometimes you'll see DD.DDD like 38.916D. This would be 38D 54M 57.6S. (.916 x 60 = 54.96M - 54=.96S x 60 = 57.6S)
|