Looks pretty good! That being said, there are a few items myself and other members of the Shipbucket Discord have noticed, and I'll point them out here.
On the image:
1 - You're missing panel lines or panel line segments in a few areas.
2 - There are some stray pixels both on the hull and on the template.
3 - Your boot topping shade is pure black, which should only be the outline color and not shadows.
4 - A part on the underwater hull looks to have been partially cut-off.
5 - The railing on the stairs aft are blue, I assume from an earlier false-color Work-in-Progress.
Things that aren't marked out on the image:
1 - The shading itself is a bit heavy and the shades don't look to be an equal value apart, with some shades being more similar to the one next to them than others.
2 - You've included panel lines on the underwater hull which mean that, at the same level of detail, a number of other details should be visible (coolwater inlets, anodes, etc.).
3 - I personally like the rust, but it is
nonstandard so perhaps include a version without it.
4 - In general the sonars and other underwater equipment seem a bit lacking in detail and shading
Please don't take this as saying it's a bad drawing, because it certainly is not. However, I feel some tweaks and fixes could make it even better.
I strive for a balance of accuracy and style, so please make recommendations or point out errors in either of those areas in a polite and concise manner. I will make the necessary changes when I am able.
Please check out my DeviantArt for military uniforms and Non-SB art at etccommand.deviantart.com
and my uniformology/Alternate-Universe DeviantArt group at https://www.deviantart.com/alternate-pixels