Conversation so far:
What is GERS?
Groupe d'Etudes et de Recherches Sous-Marines, = Underwater Studies and Research Group.
What did they do?
Underwater Research Group.
Are there any other interesting aspects about this article?
Chief Petty Officer Maurice Fargues became the first diver to die using an aqualung.
What is an aqualung?
CANNOTANSWER.

Question: How did he die?
Self-contained rewrite: How did Chief Petty Officer Maurice Fargues die?