What was the largest ship built by Harland and Wolff in Belfast?

it was the "unsinkable"TITANIC and she was 882ft long 9"

I don't think she was the biggest. I seem to recall an oil tanker sailing down Belfast Lough when I was at school in Holywood, Co Down in the late 1960's. A shell Oil tanker maybe? I think it was eather Coastel corpus christie Or Coastal Hercules both oil tankers both wer very very large tankers