If your airplane had an inflight fire at altitude, would you want oxygen deployed?
“Are you sure? Most systems give the flight crew choices so that they can best deal with whatever emergency presents itself.”
I don’t know specifically about the 777, but I did fly briefly for El Al after the IDF.
The planes automatically deployed oxygen upon pressure loss on the theory that you don’t want to depend on someone who might already be passed out to manually press the button.
“If your airplane had an inflight fire at altitude, would you want oxygen deployed?”
If I make delete your term ‘deployed’ and replace it with ‘don’, then the answer is yes.
Every jet I’ve flown says that for a cockpit or cabin fire, the first thing you do is put on smoke goggles and don the oxygen mask.
PAX O2 deploys on most aircraft automatically when the cabin altitude climbs above 14000 feet. For smoke, it can be deployed manually, but I just checked and the A320 series QRH does not have PAX O2 to be deployed for smoke - only for volcanic ash.The flight crew and the flight attendants all have personal PBE hoods for fire fighting (shielded for smoke, with a short supply of O2).