sentences:  The boat did not sight any more ships and returned from patrol on 20 July.The submarine next departed port on 3 August, patrolling the Bay of Biscay on another anti-submarine patrol.The patrol was mostly uneventful, except for 17 August, when "Syrtis"s crew boarded a Vichy French fishing vessel and sent its crew off, intending to use the ship for reconnaissance; however, the idea was abandoned for lack of wind and the men left the ship.