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On each map you should at least know where possible spawn-points for vehicles are. Nothing is more frustrating than running minutes through the blue zone, slowly dying while boosters and medkits running out and you are not able to find a single vehicle or boat. These interactive maps show where you should go. You can highlight the best areas to loot. If you have a second device ready, mark your actual flight path and the map will show areas that you can reach with a parachute without gliding long-range.
Try it out, it´s free.