Backward against the mast; said of the sails when pressed by the wind from the "wrong" (forward) side, or of a ship when its sails are set that way.
By surprise; startled; dumbfounded. (see usage)
At, near, or towards the stern of a vessel (with the frame of reference within the vessel).
located at the back of a boat, ship, or airplane
The stern portion of a vessel.