Ask @GG_irl:

Why is there a life jacket under the seat on an airplane, but not a parachute?

It is extremely uncommon for a plane to go down completely in the air which is why there are no parachutes. The life vests are there because 9.5 times out of 10 when there is an emergency on a plane it is a crash landing. Most crash landings are in the water (hence the life vests), but there can also be land crash landing in which case most don’t require evacuation. Parachutes don’t make sense unless you’re traveling somewhere where there is super harsh weather that can blow up your plane or enemy territory (ISIS territory).

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