How much wind at 12k is too fast to jump? in General Skydiving Discussions December 11, 2004 I was on one load this last summer where I was last out of the Porter with a Tandem. I checked the spot and it was okay but a bit on the short side. I was in the door waiting for the plane to go further. The pilot was giving me that look, you know, "let's go". I was still waiting to get farther accross the DZ but it wasn't happening and the Pilot was REALLY giving me that Look! "Let's Go". During this time of 'communicating' with the pilot, he realized something and we talked about it on the ground later. The moving map on his GPS had done a 180 and the plane (while it was flying forward through the sky), it was actually flying backwards over the ground. We talked about it and switched to a crosswind jump run upwind of the airport. On that day, jump run worked much better that way.