IBT=conventional hull ice breaker. Designed to be operated the year around under Arctic conditions. Deadweight 250,000 tons and as dimensions 325 (between perpendiculars)-360 (over all) x 55 (molded) x 22 (molded) x (maximum) metres. Wetted surface 29,000 tons or metres? Midship area 1,375 tons or metres? Prismatic coefficent .67. Steel weight 50,000 tons. Weight of permanent ballast 0 tons. Weight of machinery and equipment 5,000 tons. Light ship weight 55,000 tons. Cargo oil capacity 230,000 tons. Fuel oil and misc. deadweight 20,000 tons. Ballast water 0 tons. Maximum displacement 305,000 tons. Installed engine power optimal 170,000 shp. Cost estimate steel and equipment 58 million US dollars. Cost estimate permanent ballast 0 US dollars. Cost estimate machinery 60 million US dollars. Total price per vessel 118 million US dollars.
Sources
Per C. Sandnaes, Aker Group, Oslo, Norway, “The semi-submarine icebreaking tanker, an alternative for transporting crude oil or similar heavy bulk materials in arctic waters.”
Avatione Maritime, edition dated April 1976.
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