Try the garmin Etrex vista...it has a rather nice compass and a easy to use trip computer...a nice feature that it comes with is a jumpmaster program that allows you to calulater your HARP, If you don't know what that means its a High Altitude Release Point...Pretty much its where you get out to land pretty dang close to your designated landing point or PI (Point of Impact)...When all else fails just as stated by the other post, i would jump in the clouds if you can't see you dropzone...This GPS also allows you to plot you course on maps with the Garmin Maps program and has a trip log to put it to the memory as well...Hope i can help
FYI i am not a Tandem master, but i am a Jumpmaster, and a survival instructor for the military...I may not jump tandems but i do know my GPS systems. Have a great day //SIGNED//
Leonard J Clark
