Franconian Beer Message Board

Breweries using their old coolships as vessels to start a spontaneous fermentation have probably added to the confusion of what a coolship is supposed to do,

Brouwerij Vander Ghinste (formerly called "Bockor") in Belgium:

https://www.omervanderghinste.be/en/brouwerij/het-brouwproces (click on “coolship”)

Elgood’s Brewery in Cambridgeshire:

https://www.elgoods-brewery.co.uk/product/coolship/