CoCoNutz

I'm trying to solve a puzzle on a multi-stage cache and it requires that I "project" a waypoint, and I have no idea how to do this. The puzzle is similar to this ( actual details changes so as not to spoil it for others ). The next stage is located exactly 1/2 mile due south ( True ) from N 43 12.456 W 72 22.696 I'm using a Garmin Venture Help, Please