Why do tugboats spray water?

[OldJohnnyYen]

As title.

I was watching a bit on the TV where two tug boats were escorting a large ship down the thames in prep for tomorrows celebrations. They where throwing water from a bit jet behind them, anyone know why they do this?

[Vieste]

It's a salute and most tugs are fire boats.

[OldJohnnyYen]

Cheers that makes sense.

[Dogwatch]

Because they can!