Subcategories:
USNS Able (T-AGOS-20), 20 KDB Afiat (2009), M20 Albardão (ship, 1975), ARA Almirante Brown (D-20), USS Antrim (FFG-20), USS Barnes (CVE-20), D20 Benevente (ship, 1943), USS Bennington (CV-20), HMS Caldwell (I20), USS Cincinnati (LCS-20), H20 Comandante Manhães (ship, 1983), USNS Comfort (T-AH-20), P20 L.É. Deirdre (ship, 1972), USS Donner (LSD-20) (ship, 1945), HMS Fife (D20), USS Flusser (DD-20), RSS Fortitude, HMS Furusund (A 320), HMS Garth (L20), INS Godavari (F20), USS Goldsborough (TB-20), USS Goldsborough (DDG-20), USS Green Bay (LPD-20), USCGC Healy (WAGB-20), ACV Holdfast Bay (ACV 20), INS Kursura (S20), USS Laertes (AR-20), LCAC-20 (ship, 1990), USS LeHardy (DE-20), USS LST-20, HMS M20 (ship, 1941), INS Magar (L20), 20 Magat Salamat (ship, 1944), L20 Marambaia (ship, 1989), USS Mercury (AKS-20), Mitrofan Moskalenko (ship, 1990), 20 Moawin (ship, 1963), USS Monocacy (PG-20), USS Mount Whitney (LCC-20), ARA Murature (P-20), A20 Neptuno (ship, 1975), USS Otus (AS-20), P20 Pedro Teixeira (ship, 1973), USS Pentheus (ARL-20), USS Pontiac (AF-20), USS Pontus (AGP-20), USS President Hayes (APA-20), PSKA-20 (ship, 1984), Q20 Puerto Deseado (ship, 1978), R-20 (ship, 1993), USNS Redstone (T-AGM-20), USS Richmond K. Turner (CG-20), 20 Sajag (ship, 2021), HMS Savage (G20) (ship, 1942), USS Sepulga (AO-20), USS Skylark (ASR-20), USS St. Louis (C-20), TCSG-20 (ship), HMS Tiger (ship, 1945), USS Vermont (BB-20), VM-20 (ship, 1980), USS William B. Preston (DD-344) (ship, 1919), HMS Östergötland (J20)