Spirit of Tahoe
Passenger Ship Stability Test
FEA Displacement
Crane Barge FEA

Project Scope

Our client modified a fleet of oil barges to perform bunkering operations. These barges were originally classed under subchapter D and O. DMS supported stability assessment, with the goal to obtain certificate of inspection for service as a bunkering barge classed under subchapter O.

Stability Assessment

The barges were reconfigured for bunkering operations.  They included new machinery on deck, all carefully designed to avoid hazardous areas.  DMS worked to provide stability assessment reports for each of the barges.  

The main challenge for these reports were the regulatory requirements.  Barges rated for subchapter O require consideration for damage stability, intact stability, and longitudinal strength.  But these barges were reclassified for subchapter D only.  DMS worked with USCG to obtain a specific set of requirements and addressed any USCG comments.

Working with Coast Guard

The project evolved and grew.  Changes in the scope of work required several revisions to the stability assessment.  DMS supported our client throughout the process, preparing fast turn-arounds for each revision.

DMS also worked to develop a partnership with the US Coast Guard (USCG).  It can be critical to have close partnerships with USCG regulators.  DMS kept the USCG informed and worked to ensure smooth handover of information.

Return on Investment

Stability analysis often forms the critical limit on vessel operations.  USCG enforces those limits, but engineers like DMS perform the analysis and write those limits.  DMS considers the impact of this link between safety and vessel operations.  We look for alternatives and creatively explore new ways to define safety limits which still offer flexibility.

Related Services

Trim and Stability Update

After every major vessel modification, you need to update the vessel’s stability. Intact stability, damage stability, IMO requirements. We do it all. DMS provides a FREE loading condition spreadsheet with each major project. (Requires development of trim and stability booklet)

Trim and Stability Booklet

The trim and stability booklet creates an operating manual for your ship. DMS creates helpful manuals that actually get used. All T&S books include a FREE loading condition spreadsheet to help with voyage planning.

Stability Test

A stability test is one of the most subtle and complicated tasks in naval architecture. It provides data critical to determine your vessel stability. At DMS, you get preliminary results on the day of the test.