maintainance cost

The hull building cost for a submarine yacht as suggested and tested at ( concretesubmarine.com ) is already a lot more economic than building in other materials. But this becomes even more impressive when you compare long term maintainance cost. Other than a sail or motor yacht a submarine yacht is not planed to come out of the water every season. It is built to receive a similar amount of maintainance as other marine concrete structures like oilrigs and submarine tunnels do. In other words it is designed to stay in water for decades with no mayor maintainance. When we tested our concrete submarine yacht prototype we found that this unique quality pushes general operation cost of the yacht well below the operation cost of a similar sized surface yacht.