Bolca

According to the Old English Dictionary:

an;

BOLCA

m. The gangway of a ship; forus navis :-- Bolea forus, Cot. 86. Geseah weard beran ofer bolcan beorhte randas the guard saw bright shields borne over the ship's gangway, Beo. Th. 467; B. 231: Andr. Kmbl. 1203; An. 602. He on bolcan sæt he sat on the gangway, 610: An. 305. [Icel. búlki, m. the cargo of a ship.] bolca