Nice effort, but I'd say that mast outline, propeller shafts, "pillars" below the sides of the bridge should be IMHO outlined fully in black (3-pixel rule). Also I'd make a black line on the bilge keels-hull connection.
And I'd make the streaks differently too, but that's more a matter of personal preference.
Oh, and the maple leaf on the smokestack looks too anti-aliased to me.
Anyway, nice to see the "less glamorous" class of ships ("less glamorous" than CV's, BB's, DD's and the like
) being done.