People, whether hearing, deaf, blind, short, tall, etc should always be proactive about their personal safety. On public transport (plane, train, bus, etc) that means making sure that we know how to handle emergencies that may happen.
Because we know, as hoh and deaf people, that we may not understand verbal safety instructions - it's OUR responsibility to take appropriate steps (in advance) to make sure that we have access to that information. In most cases this means simply notifying the airlines (etc) that we are hoh/deaf and will require a visual mode of acquiring needed safety information.
Airlines, and most places have alternative information delivery systems - it's our job to make sure we request them - just as it's a low vision/blind individual's responsibility to inform them if they require braille or additional spoken instructions.
We have to be our own, best advocate - informing businesses of our needs, and if needed, suggesting reasonable (and simple) accommodations they can put in place to make things accessible to us.