- ULTRANAUT Pleasure craft 338071929 — —
- ULTRAVIOLET Sailing 368477310 — —
- ULTREIA Sailing 368183730 — —
- ULTREIA Other 368421660 — —
- ULTREIA Pleasure craft 368466450 — —
- ULURU Pleasure craft 338186253 — CLASS B
- ULYSSES Pleasure craft 338374787 — —
- ULYSSES Pleasure craft 368427050 — —
- UMA BRISA Sailing 338522433 — CLASS B
- UMB LANDING CRAFT Special purpose 338424354 — CLASS B
- UMIAK Pleasure craft 368101510 — —
- UMIAK V Pleasure craft 367614620 — CLASS B
- UMOYA Sailing 368233820 — CLASS B
- UN-CORKED Pleasure craft 338522205 — —
- UNA COSA MAS Pleasure craft 338567612 — CLASS B
- UNA MAS Pleasure craft 368150190 — CLASS B
- UNA VIDA Pleasure craft 368499080 — —
- UNACCOUNTABLE Pleasure craft 338360022 — —
- UNALAQ Tug 338718000 9765732 HOMER
- UNANIMOUS Pleasure craft 367690930 — —
- UNASSISTED LIVING Pleasure craft 338366673 — —
- UNAUTHORIZD PURCHASE Pleasure craft 338172405 — CLASS B
- UNAVAILABLE Pleasure craft 338048265 — —
- UNAVAILABLE Pleasure craft 338135852 — CLASS B
- UNAVAILABLE Pleasure craft 338137487 — CLASS B
- UNAVAILABLE Pleasure craft 338186779 — —
- UNAVAILABLE Fishing 338206338 — —
- UNAVAILABLE Pleasure craft 338387222 — CLASS B
- UNAVAILABLE Pleasure craft 338394917 — —
- UNAVAILABLE Pleasure craft 338483506 — —
- UNAVAILABLE Pleasure craft 367525680 — CLASS B
- UNAVAILABLE Pleasure craft 367793030 — LAST TONA
- UNAVAILABLE Pleasure craft 368051990 — LAST TTOWN
- UNAVAILABLE Pleasure craft 368315990 — CLASS B
- UNAVAILABLE Pleasure craft 369970937 — CLASS B
- UNBELIEVABLE Pleasure craft 338211133 — —
- UNBELIEVABLE Pleasure craft 368235930 — —
- UNBOUND 2 Pleasure craft 368347820 — CLASS B
- UNBREAKABLE Sailing 367566330 — —
- UNBRIDLED Other 338170835 — —
- UNBRIDLED Other 368035180 — —
- UNBRIDLED Other 368147620 — US^0SLE → 0QRH
- UNBRIDLED Pleasure craft 368472460 — CLASS B
- UNBROKEN WINGS Pleasure craft 338138841 — —
- UNCAGED Sailing 368122530 — CLASS B
- UNCAS Pleasure craft 338479792 — —
- UNCENSORED Sailing 338479885 — CLASS B
- UNCHAINED MELODY Pleasure craft 338410461 — CLASS B
- UNCHARTED Pleasure craft 338411306 — —
- UNCHARTED Other 338549857 — —
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