outdraft

From out- +‎ draft.

outdraft (plural outdrafts)

1. (nautical) An outward current, often specifically a river current pulling toward a downstream dam.
   • 2004, Virginia Thorndike, On Tugboats, page 290:

     The outdraft is like a funnel, pulling the boat and tow out into the river, away from the lock and toward the dam.

   • 2017, Diane Wood, Larry Alexander v. Ingram Barge Company:

     Only a person stationed at the front of the lead barge or on one of the assist boats could have alerted the captain to the moment when the tow hit the outdraft.