English: The U.S. Navy Cimarron-class fleet oiler USS Guadalupe (AO-32) refueling the Australian guided missile destroyer HMAS Hobart (D39) in the spring of 1967. HMAS Hobart was taking part in Operation "Sea Dragon". During the Vietnam War, "Sea Dragon" was a series of naval operations beginning in 1966 to interdict sea lines of communications and supply going south from North Vietnam to South Vietnam, and to destroy land targets with naval gunfire. The primary purpose of Sea Dragon forces was the interception and destruction of water borne logistic craft (WBLC), which ranged in size from large self propelled barges down to small junks and sampans.