A water salute is an occasional occurrence used for a ceremonial purpose. It typically consists of a vehicle which travels under plumes of water expelled by one or more fire-fighting vehicles, as a mark of respect or appreciation.

At an airport, typically an even number of airport crash tender fire-fighting vehicles will arrange themselves perpendicularly along the sides of a taxiway or apron; they will emit coordinated plumes of water which form an arch (or series of arches) as an aircraft passes. Symbolically, the procession looks similar to a bridal party walking under a wedding arch or the saber arch at a military wedding.

Water salutes have been used to mark the retirement of a senior pilot or air traffic controller, the first or last flight of an airline to an airport, the first or last flight of a specific type of aircraft, as a token of respect for the remains of soldiers killed in action,^[2] or other notable events. When Concorde flew its last flight in 2003 from John F. Kennedy International Airport, red, white and blue coloured plumes were used.^[3]

Water salutes are also used for ships and other watercraft, with water being delivered by fireboats. This is often done for the first or last visit or retirement of a senior captain, the first or last cruise of a ship, the visit of a warship, or other ceremonial occasions. A notable example was the water salute to HMS Hermes (R12) as she returned to Southampton following her part in the victory of the Falklands War.

• Plume (hydrodynamics)
• Salute
• Water cannon