IBU 15

Inshore Boat Unit 15 (IBU 15) was a United States Navy Reserve unit specializing in coastal and port security operations. Established as part of the Navy Expeditionary Combat Command, IBU 15 provided force protection, maritime patrol, and escort duties, often in support of operations in the Middle East and other strategic locations. The unit operated small, fast boats and was tasked with defending harbors, high-value assets, and shipping lanes against asymmetric threats. IBU 15 was ultimately reorganized under the Coastal Riverine Force structure as the Navy modernized its expeditionary capabilities.