Two shore pingoes at Tuktoyaktuk Airstrip, Northwest territories, Canada. A stationary helicopter, with a jeep next to it, is in the middle ground on the airstrip. A view of the tail of a second helicopter is on the right hand side of the image. Shore pingoes (described by the photographer in his autobiography as caused by expanding ice lifting the soil) are in the background. This is Slide 53 of a lecture titled "World Wide Ship Delivery" given by Captain Henry P. Bird detailing his service as Chief Officer for the suction hopper dredger Geopotes X (1969), owned by Volker Dredging Co Ltd, from 24 June 1980 to 14 July 1980. The lecture also details his service with the same ship as Second Officer, chartered by Dome Petroleum Company, Canada, from 4 August 1980 to 11 September 1980. The lecture consists of 56 slides.