Petty Officer 1st Class David Alegria, lead petty officer for training at Naval Small Craft Instruction and Technical Training School, troubleshoots the radio and intercom system on a 25-foot Security Force Assistance combat craft. The school took delivery of four of the vessels from Naval Special Warfare Group 4, Nov. 3. The new craft will be used to train international students in small craft skills and improve U.S. and partner nation maritime force interoperability worldwide.