To use ToDegrees, you first need to load the Geodesy Package using Needs["Geodesy`"].
The coordinates are adjusted to stay between -180 and 180 degrees.
Note that the sign of degrees is enforced on minutes and seconds; so {-34, 3, 2} means 34 degrees, 3 minutes, and 2 seconds W (or S), as does {-34, -3, -2}.