Frank gives the beach camp a trail to follow

Frank packs up a satellite phone with a GPS locator activated before the helicopter takes off. He puts in in a pack and drops it as the helicopter flies over the beach camp. There are two signals on the GPS unit. One is the sat phone that Jack has (the red triangle) and the other is on the chopper (the yellow dot), possibly Keamy's sat phone. Jack thinks that the chopper wants them to follow it.