Which entity is known for providing detachments and organizations for service on armed vessels?

The Marine Corps is recognized for providing detachments and organizations specifically for service on armed vessels. This is part of their historical role as an amphibious force, where they are trained to operate both on land and at sea, particularly on Navy ships. The Marine Corps has a rich tradition of working closely with the Navy, thus forming a critical component of naval operations. Their detachments often serve on ships to provide security, conduct boarding operations, and offer a rapid response force in maritime settings, leveraging their unique training and capabilities.

While other military branches may have roles related to maritime operations, none have the same specific focus on sea service and shipboard assignments as the Marine Corps.