Petty Officer 1st Class William Carl, a boatswains mate for PSU 307, tosses a rope to Port Security Chief Edward Messina as he pulls his Viper patrol boat into dock here, Aug. 19, 2008. PSU 307 provides maritime safety and security for the water around U.S. Navy Station Guantanamo Bay and Joint Task Force Guantanamo. JTF Guantanamo conducts safe and humane care and custody of detained enemy combatants. The JTF conducts interrogation operations to collect strategic intelligence in support of the global war on terror and supports law enforcement and war crimes investigations. JTF Guantanamo is committed to the safety and security of American service members and civilians working inside its detention facilities.