sentences:  The Petya had been on patrol at the Soviet Korean Straits station and followed "Richmond K. Turner" to TU 71.0.4.The next day "Sterett", en route to the Gulf of Tonkin, sighted a fishing boat north of Taiwan flying the Republic of Korea ensign.The boat, later identified as "BT 22210", was adrift with its engine inoperative and making frantic visual signals for assistance.