Long abandoned in the Musquash Estuary.
My main source identifying tug and location within the Estuary is Graeme Scott, grandson of C.N. Wilson (Saint John Drydock & Shipbuilding and Saint John Tugboat Co.). Graeme was instrumental pointing me in the right direction as to where the tug was reported to have been abandonded many years ago, as well as providing tug former name.
The following additional information was sourced through the "Maritime History of the Great Lakes" site...
Formerly the MARGARET A. HACKETT. Built in Quebec City in 1912. First rebuild in 1936. Official Number 131016. Propulsion: Screw dimensions 99 X 24 -- 155 tons.
Owned by Quebec Transportation & Forwarding Co., 1913, 1936; Canada Shipping Co. 1917; to George Hall Coal & Transportation Co., 1917, 1922; Saint John Drydock & Shipbuilding Co. 1927; Saint John Tugboat Co. 1935. Built by Q.T. & F. Co., Quebec 1912. Engine second-hand, rebuilt to 20-36X30 by F.X. Drolet, Quebec 1912. Tug rammed and sunk by "Brookdale" 16/07/20 Lake St. Peter. Retired 1961, moved to Indiantown, N.B. for preservation but later broken up.

Note: A photo of the Ocean Hawk (John Weeks Collection) can be found on page 105 in the book "Masters of Tides and Tugs" by Captain Donald H. Duffy & E. Neil McKelvey