In the 90s When any ship is launched or had its first journey then marine staff used a water cannon salute to celebrate the occasion by spreading water over the ship.
. As most of the rules are taken from Marine Industry by Aviation so this Tradition has also become popular in Aviation.
The Salt Lake international airport used a water cannon salute for the First Time in the aviation industry to show honor and gratitude to Delta Airlines Pilot
Shaping the Future of the Aviation Industry: The Power of Technological Advancements