In-Port Security Detachment

An in-port security detachment is a force-protection team deployed to guard a warship, auxiliary, or high-value asset during a port visit or anchorage, when the unit is least able to maneuver away from a threat. The detachment mans topside watches, controls the brow and waterline, operates picket boats, enforces the harbor exclusion zone, and applies the challenge, warn, and engage sequence under the unit’s force-protection rules of engagement. The model is a direct response to the USS Cole attack of 12 October 2000, which exploited a stationary ship taking on fuel in Aden.