In addition to the maritime applications they were developed for, bosun's chairs are also used for working at height in various maintenance industries.
In commercial window cleaning, the term bosun's chair describes devices suspended from rope and equipped with seatboards, such as descent-only controlled descent apparatuses (CDAs).
The officer would have the chair put under him, or the French bowline tied around him, and then sideboys would lift him onto the deck of the ship on the command of the bosun's whistle.
[3] The event requires a line running through a block connected to a tower, simulating a ship's mast.
Time again starts when the person touches the ground or their partner, and is stopped finally when the knot is untied, and the participants stand at attention again.
If the French bowline is tied wrong or does not have the six inches of tail required, safety will be called and with time running, the competitors will have to fix this.