Mark 7 Marine Mammal System (MMS) bottlenose dolphins in the U.S. Navy's Marine Mammal Systems Program (MMSP) supported dynamic mine countermeasure (MCM) training during the Rim of the Pacific (RIMPAC) exercise in the Southern California (SOCAL) area of operations.

The dolphins are part of the U.S. Navy Marine Mammal Program (MMP) based at Space and Naval Warfare Systems Center Pacific on Naval Base Point Loma in Southern California. During the training, MMSP technicians conducted a mine hunting session with one of the dolphins. On its way to the training minefield, the dolphin traveled by boat protected by a padded, folding mat. Once the group arrived on station, a technician unfolded the mat and the dolphin slid into the water to seek out and mark the simulated mines.