After being àbout 20 minutes on the water .. My gt31 gps died on me. It seems you have to charge the dang thing so now and then:-) I did Some runs when my gps was off but had my bits of fun out there on the water.. I tried à C3 slingshot25 for the first time Underneeth my FF102..which worked out out better than i first expected. Maybe Next session with gps ;o) West 14-27knots