nine o'clock
Foiled in her efforts to get in touch with her consorts , U75 remained awash . The heave of the sea made it most difficult for her to use her periscope with certainty , for she had chosen a bad pitch on her ascent -- the furious `` overfalls '' or `` tide-rips '' to the west of Lundy Island . `` We 'll pay another visit to St. Mena 's Island , Herr Rix , '' decided Kapitan Schwalbe , after the two officers had discussed the sinister matter of their futile attempt to make use of the wireless . `` To-night at nine o'clock ought to suit . If we can not get von Ruhle to see our signals -- for my own part , I doubt whether he is in these parts -- we 'll have to do our best to get ashore . Meanwhile , keep a bright look-out . If we see any likely vessel coming this way , we 'll try our luck once more . ''