Zelee Subglacial Trench is a subglacial valley on George V Coast, running NNE-SSW and coinciding with the trough cut by Mertz Glacier. The feature was delineated by the Scott Polar Research Institute (SPRI)-NSF-TUD airborne radio echo sounding program, 1967–79, and named after the corvette Zelee (Lt. Charles Jacquinot) of the French expedition, 1837–40 (Capt.