Mobile Diving and Salvage Unit 1 Navy Petty Officer 1st Class Fernando Hernani, left, a diver, inspects his breathing apparatus while Navy Petty Officer 1st Class Michael McClelland, a diver, mans a tending line prior to conducting an anti-terrorism force protection dive inspection on a Bahraini tug boat prior entering a Bahraini Port. MDSU-1 conducts ATFP dive operations to ensure the safety and security of incoming and outgoing vessels as part of maritime security operations.