I haven't been able to track down a full OB, but vessels on station included:
3rd Rates: Eagle 64, Asia 64
5th Rates: Phoenix 44, Rainbow 44
6th Rates: Greyhound 28, Rose 24
Bombs: Carcass 8, Thunder 8
John Gallagher, in 'The Battle of Brooklyn 1776' (a book which must be used with a lot of care) credits Howe with two liners, 23 frigates (in which he mistakenly includes 5th Rates), and "a great number of sloops, cutters, and bomb ketches and one schooner". He only, however names the vessels above, misrating Phoenix and Rainbow as frigates