Abaft prep. : Behind; toward the stern from; as, abaft the wheelhouse.

Abaft adv. : Toward the stern; aft; as, to go abaft.

Example:
How about a word? Page 1 of Louis Leslie's "20,000 Words" (1944 Edition) do you use 'Abject' anymore?

Taxonomy
funnel, free encyclopedia, search, picture, steamship, ventilator, vessel, chimney, Personal tools, Interaction, Toolbox, Languages, non-profit organization, cowls, stern, expression, boat, en.wikipedia.

Defination from the web:
abaft the funnel on an early steamship. Notice that the ventilator cowls on either side of the funnel are directed towards the stern of the vessel. ... Note that unqualified or in the "abaft the beam" form, abaft does not necessarily refer to a point actually ...