What safety equipment must be checked before a flight's takeoff?

The chosen answer highlights essential safety equipment that must be verified for functionality and accessibility before a flight's takeoff. Life vests and oxygen masks are critical for passenger safety in the event of an emergency; life vests are particularly necessary for overwater flights, while oxygen masks provide supplemental oxygen when cabin pressure drops. Emergency exit signage ensures that passengers are aware of the nearest exits, which is crucial in any situation where a rapid evacuation might be required.

In aviation safety protocol, checking this equipment is vital to ensure that all safety measures are in place and operating correctly, thus safeguarding both passengers and crew. The presence and readiness of this safety gear contribute significantly to emergency preparedness on board.