Top view of a boat on blue water with two people in a floating device tethered to the back, and a Simrad NSO 4 marine navigation display shown on left side.

Semi-submersible 146m vessel has a tennis court, botanic garden and four aquariums

A semi-submersible former support vessel has been converted by Karmarine Shipyard into an unusual expedition yacht, with a grass tennis court and enough room to carry 70 luxury toys, a 46m sailing yacht and a sea plane.

Now called OK, the vessel was built by Oshima Shipbuilding in 1982 as a yacht transport ship, and was originally known as AS Super Servant 3. The conversion was completed by Turkey-based Karmarine Shipyard with exterior design by Timur Bozca.

A selection of the vehicles that OK can carry

The yacht has a sun deck jacuzzi, swimming pool surrounded by glass windows, outdoor cinema, botanic garden, four aquariums and enough room for 20 guests. OK also has a large car ramp, a 40-tonne crane and a vertical wind turbine.

OK can also be partially submerged – the vessel carries various amphibious toys, tenders and vehicles, which can be floated on and floated off.

The semi-subersible yacht comes with a sea plane among other luxury toys and vehicles
OK was converted from a yacht transport vehicle built in the 80s

Bozca says OK has been designed with enhanced internal strength, so the vessel can handle both stern and side loading.

The designer says the yacht is a “world-girdling expedition ship”

The owner and price of this extraordinary conversion have been kept private, but the designer confirms she is currently on the water and exploring the world.

A foiling dinghy glides on the water, showcasing high-performance equipment, alongside Pro-Set's epoxy solutions for composite manufacturing.

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