The “Ideal costume for Aviator”

Dreadnaught Safe Suit 1919

Such survival suits are still in use today with the Air Force, Navy, etc. (“Poopy Suits,” we called them). This ad poses a bit of a question: what type of mechanical difficulties might necessitate “getting into cold water” some “10 miles off coast” to effect repairs to your aircraft? You would be in the open sea; what are you going to fix bobbing around like a cork?  But this ad dates from 1919; flying machines had a bad habit of suddenly not working, and one had to be ready for anything.