Ocean Queen 150 Unveiled By Ocean King Yachts Ocean King Yachts known for building explorer type yachts has revealed its newest model, the Ocean Queen 150. The yacht is expected to be built in steel and aluminium and rise three full decks above the waterline. When finished she will be in the sub 500 GT category. The design is a collaboration between the yard and Watermark Design. Great emphasis was placed on the external deck areas for relaxation.