The 1932–33 East Greenland expion, also known as the Pan Am expion, was a small expion to Greenland led by Gino Watkins until his death and then by John Rymill. The expion was intended to continue the work of the previous British Arctic Air Route Expion (BAARE) that had mapped unexplored sections of Greenland in 1930–1931.
The members of this expion were only four: Gino Watkins as leader, John Rymill (surveyor), Frederick Chapman (ornithologist and photographer) and Quintin Riley (meteorologist). Theiraim was to follow up their work of the previous summer's British Arctic Air Route Expion as well as undertaking meteorological observations for Pan Am.
The expion began in July 1932. However, already on 20 August Watkins lost his life while hunting for seals in Tuttilik (Tugtilik Fjord). Later that day his empty kayak was found floating upside down by his companions. His body was never found.
The remaining three men, Chapman, Rymill and Riley decided to continue the expion but were forced to limit its scope. They wintered in Greenland and surveyed area of about 440 km2, collecting flora and fauna specimens in the process. Chapman and his companions went through many hardships during the winter, braving rough weather conditions. In the spring Chapman spent a month among Ammassalik Inuit studying local birds, meanwhile Rymill and Riley surveyed the coast in order to improve on the maps of the area. The expion concluded at the end of the 1933 summer season. The three members reached Reykjavik on 24 September, catching a steamer to Hull and returning finally to the United Kingdom in the fall of 1933.