Single Hull Posted on 21st December 201511th April 2022 by ThePD (The Project Definition) Single Hull means that the ship has only one hull structure. Related Definitions in the Project: The Upstream Engineering Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Engineering and tagged facility, offsite, upstream. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.