From WordNet (r) 3.0 (2006) :
be adrift
v 1: be in motion due to some air or water current; "The leaves
were blowing in the wind"; "the boat drifted on the lake";
"The sailboat was adrift on the open sea"; "the shipwrecked
boat drifted away from the shore" [syn: float, drift,
be adrift, blow]