'Fleet captain' definitions:

Definition of 'Fleet captain'

From: GCIDE

Fleet \Fleet\, n. [OE. flete, fleote, AS. fle['o]t ship, fr. fle['o]tan to float, swim. See Fleet, v. i. and cf. Float.] A number of vessels in company, especially war vessels; also, the collective naval force of a country, etc. [1913 Webster]
Fleet captain, the senior aid of the admiral of a fleet, when a captain. --Ham. Nav. Encyc. [1913 Webster]