The Collaborative International Dictionary of English v.0.48:

Kedge \Kedge\ (k[e^]j), v. i. [imp. & p. p. Kedged (k[e^]jd);
   p. pr. & vb. n. Kedging.] [Cf. dial. Sw. keka to tug, to
   drag one's self slowly forward; or perh. fr. ked, and kedge,
   n., for keg anchor, named from the keg or cask fastened to
   the anchor to show where it lies.] (Naut.)
   To move (a vessel) by carrying out a kedge in a boat,
   dropping it overboard, and hauling the vessel up to it.
   [1913 Webster]