What was the SS Frosta
SS Frosta was a Norwegian oil tanker, built in 1961 in Germany by Bremer Vulcan and owned by A/S J. Ludwig Mowinckels Rederi of Bergen, Norway. The Frosta was 664 feet in length, 90 feet in breadth, with a gross weight of 22,850 tons, and powered by a steam turbine engine, rated at 16,800 horsepower. It was rebuilt as a chemical tanker in 1971. It was decommissioned in 1979.
Instruction: What was the SS Frosta
Context: 
Response: SS Frosta was a Norwegian oil tanker, built in 1961 in Germany by Bremer Vulcan and owned by A/S J. Ludwig Mowinckels Rederi of Bergen, Norway. The Frosta was 664 feet in length, 90 feet in breadth, with a gross weight of 22,850 tons, and powered by a steam turbine engine, rated at 16,800 horsepower. It was rebuilt as a chemical tanker in 1971. It was decommissioned in 1979.