Well first off, its a dangerous place. As you have already shown trying to learn while flying the thing is not a good idea, you and the idiot next to you could have killed yourselves and a whole lot of other people, and for what cause? so you could learn. The briefing room/classroom is the place to learn how to use the very thing (GPS) that you claimed to know by filing that suffix code in your flight plan. I will put it bluntly, you and the guy you were flying with have no business in the air with the equipment you had if you dont know how to use it....YOU COULD HAVE KILLED SOMEONE!!! Your ignorance to the fact that you guys f'ed big time scares the hell out me and makes me happy to know that I dont come into contact with you on a regular basis. The premise that you rely on a crusty old captain to bail you out a situation that you had no business in being in is even more freighten than the fact that you somehow passed a checkride that gave the right to teach people how to fly. Hope you dont end up as a statistic with my family aboard. Like rickair said, learn your equipment before you choose to do something stupid like "just wing it" and hope everything turns out okay...Its clowns like you that end up lawn darting a giant piece of steel into the ground.