Grappling Techniques Marines grapple during a Martial Arts Instructors Course in the pool at Marine Corps Base Hawaii, March 30, 2018. Marines must complete the course to become instructors at their units. Marine Corps photo by Lance Cpl. Isabelo Tabanguil SHARE: Download: Full Size (2.8 MB) Tags: Marines, training, Marine Corps Credit: Lance Cpl. Isabelo Tabanguil VIRIN: 180330-M-QB730-103A.JPG Photo Gallery