/sci/ - Science & Math

>>15385292
I think that wouldn't help much if a cloud of dust fell on you, but yes that's certainly a good way to handle many hazards.

Fun fact: The 1916 version of 20,000 Leagues Under the Sea had underwater diving scenes that were filmed using a reverse periscope (camera above the water, because 1916, but using mirrors to film below water.) The movie also features a real submarine.