I believe I have seen "Floating Fun Park" which has inflatable slides when looking at the port Bermuda webcam. I searched for Floating Fun Park Dockyard Bermuda and found this:
Spend a day in Dockyard aboard the 'Longtail Floating Fun Park'! Equipped with 2 Water slides, 2 Diving Platforms and a full cash bar, for a family friendly fun day!
Includes:
Floating Fun Park with 3 Water Slides and Swimming
Full Cash Bar available on-board (Cash only accepted)
Restrictions:
Minimum 5 Years Old to use the water slides
Not suitable for persons with neck, back, leg, shoulder injuries and/or other physical limitations
Use of the water slides is at the guests own risk
All participants using the water slides must be strong swimmers and able to swim without flotations
All minors must be accompanied on the boat by a parent or guardian
Cost: $25 Per Person + 10% Port Fee Duration: At your leisure Operates: 10:00am to 6:00pm Check In: Island Tour Centre, Dockyard; For Wrist Bands & Waivers Excludes: Gratuities for the crew