The Collaborative International Dictionary of English v.0.48:
Disembarkment \Dis`em*bark"ment\, n. Disembarkation. [R.] [1913 Webster]WordNet (r) 3.0 (2006):
disembarkment n 1: the act of passengers and crew getting off of a ship or aircraft [syn: debarkation, disembarkation, disembarkment] [ant: boarding, embarkation, embarkment]