Early morning attack (in darkness) on convoy 26 April - initial attack on ATLANTIAN at 00.41 followed by coup de grâce at 01.07
dashed track is small cruiser "ROCHESTER"

Three approaches on convoy on 30 June:  I AM day attack (unsuccessful) - II PM day attack (unsuccessful, periscope damaged)
III PM day attack on ORIGEN - the ship was sink the next day with a coup de grâce