A view of the aft sheave of the cable ship John W. Mackay (1922) at sea. The photographer is standing on the port side just aft of the funnel looking aft and slightly to port. A red and white lifebelt with the words "John W. Mackay, London" are painted on the side. There is a black and white painted ventilator in the foreground at the bottom of the image. There is a metal framed structure covered with a green tarpaulin in the foreground. This is Slide 10 of a series of slides detailing Captain H. Bird's service as Watchkeeping Officer on board the cable ship John W. Mackay (1922) owned by the Commercial Cable Company of London from 22 January 1973 to 26 April 1973. The series consists of 62 slides.