Official USMC Reversible Woodland MARPAT/Coyote Field TarpGenuine Issue USMC Reversible Woodland MARPAT/Coyote Field Tarp. NSN: 8340-01-519-2701. The Field Tarp is designed to provide Marines with a lightweight, waterproof covering, which can be used as ground cover, sunshade, gear cover, field litter, and a hasty shelter (Bivy). Original packaging..