'''Francis Rawdon Moira Crozier''' {{postnom|country=GBR|FRS|FRAS}} (17 SeptemberOctober 1796 – disappeared 26 April 1848) was an [[Irish people|Irish]] officer of the [[Royal Navy]] and polar explorer who participated in six expeditions to the [[Arctic]] and [[Antarctic]]. In May 1845, he was second-in-command to [[Sir John Franklin]] and captain of {{HMS|Terror|1813|6}} during the [[Franklin expedition]] to discover the [[Northwest Passage]], which ended with the loss of all 129 crewmen in mysterious circumstances.