This HLV ( Heavy Lift Vessel) or Crane ship, this is a self-propelled catamaran with 8 Azimuth Thrusters giving a max speed of 7 knots.

It was built in 1991 to assist in Bridge Building and later for Wind Generators.

The setup I have used is on the famous Oresund Bridge between Sweden and Denmark, later had more uses including power generation. Based in Rotterdam owned by Balast Nedam Offshore Energy from Nieuwegein, Holland.

At max weight the hoisting speed is 0.35 m/min Gross Tonnage is 14035 and can lift 8700 ton

The model is 540 x830 x 770 mm high. Built with info from Kees Trommel with some photos by John Chilton.

see on You Tube :- https://www.youtube.com/watch?v=8MJxEVc4Wns&list=PLhOLTiCBptCKUsUTJnp9mqsNy8fyGLDH9&index=6&t=0s