COSSACK was informed the CCRAK Arlene would arrive at Yang do at 1800 that day, from Yo do (Wonsan). Later this was amended to the 13th. Not being sighted that day enquiries led to a reply that she would sail at 0830 and arrive at 2130. At 1600 COSSACK proceeded to the southwest in an attempt to contact her before dark. There was thick fog but a vessel was soon picked up by radar which proved to be another CCRAK ship – the Sea Turtle – also on her way to Yang do. Nothing had been known about this ship. The COSSACK searched some 45 45 miles to the southwest but failed to find the elusive Arlene. Eventually USS Wiltsie reported at 0130 on the 14th that she had picked up the crew of the ARLENE. They had abandoned ship after running ashore at 2115 on 12th June – some nine hours before she had left Yo do! This discrepancy has never been cleared up.