Generate a correct and concise answer for the question based on the words in the context.
Q: Context : Raymond Rallier du Baty (30 August 1881 - 7 May 1978) was a French sailor and explorer, from Lorient in Brittany, who carried out surveys of the subantarctic Kerguelen Islands in the southern Indian Ocean in the early 20th century.
Question : When did Raymond Rallier du Baty die?
A:
7 May 1978