What follows is photos of eleven Vane Brothers tugboats.  Can you identify the four that are 3000 hp;  the others are all 4200 hp.  The difference lies with the height of theupper wheelhouse.

You choices are Susquehanna,

Magothy and Fort McHenry,

 

Cape Fear,

Fells Point,

Choptank,

Fort McHenry again,

Pokomoke,

Hunting Creek,

and again . . .

Patuxent, and

Elizabeth Anne.

All photos, WVD.

The 3000s are Fort McHenry, Fort Schuyler, Fells Point,  Hunting Creek.  The key is the shorter upper wheelhouse stalk.