Nice work! Those small vessels can be really tricky to get right.
Which reminds me: Back when I started drawing ships for shipbucket, the 27,5m class was the first ship I really attempted to draw from scratch. Somehow I never finished it, don't really know why. Below is as far as I got back then, you can continue from it, if you want:
Also, during some of my holidays I saw several of the ships and took several photographs of several different ships. If you want, I'll sent them to you over the weekend.
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My worklist
Any help and source material is always welcome.