This is a very nice piece of work, however there are a couple of issues.
First of all the destroyers could do with some more shading, especially under the overhangs. I'd also up the contrast between the hull and superstructure, but that's just personal preference.
The shading on the bow of the Kronprinz class doesn't really match up. One would expect the shading above and below the waterline to match up. There's also a number of overhangs that lacks shading.
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