The Collaborative International Dictionary of English v.0.48:

Debark \De"bark"\, v. t. & i. [imp. & p. p. Debarked; p. pr. &
   vb. n. Debarking.] [F. d['e]barquer; pref. d['e]- (L. dis-)
   + barque. See Bark the vessel, and cf. Disbark.]
   To go ashore from a ship or boat; to disembark; to put
   ashore.
   [1913 Webster]