Vessel Conversion: "Lancelot" Simple Barge to Offshore Accommodation Vessel

Lancelot - Offshore Accommodation Vessel designed to carry 620 Persons operating in North Sea

The Offshore Accommodation Vessel "Lancelot" is an Offshore Accommodation Vessel designed by GB Marine to operate in the North Sea. GB Marine’s scope of work includes the complete design and engineering of the superstructure, complete design of the vessels various piping systems, crane support structures and finite element analysis, Helideck Structures and related analysis, permissible length calculations,  intact and damage stability computations for compliance with class requirements. 


Image Caption: Conversion of Simple Barge to Offshore Accommodation Vessel carrying 620 Persons, engineered by GB Marine to operate in North Sea.

Scope of Work:


  • Inclining Experiment Procedure and Report
  • Stability - Intact and Damage
  • Helideck Structural Analysis
  • Strength Analysis for 25 MT Crane Support
  • Permissible Length Computations


  • General Arrangement
  • Helideck Structures
  • Helideck Access Arrangement and Detail
  • Accommodation Modules
  • Deck House
  • Crane Support Structures
  • Forward Bridge Construction
  • Forward and Aft Thrusters Structure Details
  • Modification of Engine Girders
  • Addition of Water Tight Bulkheads
  • Damage Control Plan


  • Vessel Piping Systems
  • Bilge, Ballast Systems
  • Compressed Air System
  • Fuel Oil System
  • Emergency Bilge Suctions Systems
  • Fire Piping Systems