For other ships of the same name, see HMS Ruby
||Allin, Deptford Dockyard
||25 March 1708
||HMS Mermaid, 1744
|General characteristics 
|Class & type:
||1706 Establishment 50-gun fourth rate ship of the line
||130 ft (39.6 m) (gundeck)
||35 ft (10.7 m)
|Depth of hold:
||14 ft (4.3 m)
||Full rigged ship
- 50 guns:
- Gundeck: 22 × 18 pdrs
- Upper gundeck: 22 × 9 pdrs
- Quarterdeck: 4 × 6 pdrs
- Forecastle: 2 × 6 pdrs
HMS Ruby was a 50-gun fourth rate ship of the line of the Royal Navy, built by Sir Joseph Allin at Deptford Dockyard to the 1706 Establishment, and launched on 25 March 1708.
She achieved an unwelcome notoriety in March 1741 when her captain, Samuel Goodere, was convicted of murder at Bristol and subsequently hanged; he had enticed his elder brother, Sir John Dineley Goodere, 2nd Baronet, on board, and had caused him to be strangled in the purser's cabin.
Ruby was renamed HMS Mermaid in 1744, and was sold out of the service in 1748.
- ^ a b c Lavery, Ships of the Line vol.1, p168.
- ^ Emlyn, Sollom, ed., Complete Collection of State Trials (1742) vol. VI p. 797 et seqq.; online (PDF) here
- Lavery, Brian (2003) The Ship of the Line - Volume 1: The development of the battlefleet 1650-1850. Conway Maritime Press. ISBN 0-85177-252-8.