Three ships of the British Royal Navy have been named HMS Cutlass after the weapon:
- HMS Cutlass (G74), a Weapon-class destroyer laid down in 1945 but cancelled before completion.
- HMS <i>Cutlass</i> <span class="nowrap">(P274)</span>, a Scimitar-class fast training boat launched in 1968 and disposed of in 1982.
- HMS Cutlass (P295) is the first of the new Gibraltar fast patrol boats.
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