Shipping in the Gatun Locks on the Panama Canal. The photographer is looking north from the top of the incline abreast the upper chambers of the west and east locks showing a British Tanker Company motor tanker in the west centre chamber. She is in ballast and has been raised to the level of the upper chamber. In the distance leaving the lower chamber of the east locks heading north is the United States Navy aircraft carrier Lexington (1925) with a flight deck full of aircraft.. She is seen from directly astern.