 Civilian mariners help man military seal of command ships to support the Navy's mission. Specialist Raul Pacheco shows us how. The military seal of command provides qualified personnel to help support the Navy's global mission by fulfilling the increasing demand for civilian mariners. MSC has been operating the ship with Active Duty Navy for approximately eight years. The Active Duty Navy is able to operate the ship with a reduced number of Active Duty personnel. MSC has the manpower to fill in the roles where they can and so we're mission effective with this complement of personnel. MSC civilian mariners now operate on roughly 110 ships across the globe, ranging from small talkboats to 900 foot long hospital ships. Specialists Raul Pacheco, Fastlane Naval Base, Scotland.