Bosun's chair

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.

Bosun's chair used by a crew member of the ORP Iskra
A bosun's chair, in use by a bosun , re-tarring a section of a backstay on the Prince William after making a minor repair.
A window cleaner's bosun's chair connected to a descent-only rope system
View from the bosun's chair towards the ship deck from a height of around 15 m, the full mast height of the c. 12 m long sailing yacht. The photo was taken while a broken line running over the top of the mast was being replaced.