Scope of work
Lift Crew hauled out and blocked the 56 Ton/55′ vessel
A major part of the original scope involved the installation of a new sponson on the outer shell of the vessel. This significant structural modification was aimed at enhancing the vessel’s buoyancy and stability. By adding the sponson, the Bill L increased its beam, which not only improved its stability in rough seas, making the vessel more versatile for a variety of operations. This upgrade also contributed to the vessel’s increased displacement and improved its overall performance.
The Bill L originally featured a wet exhaust system that expelled exhaust gases through the transom. The refit plan included converting this to an above-deck exhaust system with removable funnels.
- Displacement: Increased from 95 tons to 120 tons when fully laden.
- Length: Extended to 16.8 meters from 16.0 meters.
- Beam: Expanded to 7.0 meters from 5.5 meters.
- Exhaust System: Converted from wet exhaust through the transom to an above-deck exhaust with removable funnels.
- Fendering: Installed new Schuyler 25,000 lbs fenders for improved hull protection.
- Winch System: Added a winch capable of handling 1-1/4″ x 1,200′ line.
- Vessel dipping operations commenced to confirm the waterline, successfully achieving the planned displacement adjustments.
- Skeg pressure testing was completed successfully for BV inspection, marking a significant milestone in structural upgrades.
- Engine tests were successfully completed, verifying the performance of the new exhaust system and other mechanical enhancements.
- Removal of bulwarks began to enhance maneuverability and improve access points for maintenance.
- New cradle construction for port and starboard launch mechanisms was completed, utilizing a sample life raft (LR) for fitting.
- A new helm casing was installed, modernizing the ship’s control systems and improving ergonomics for the crew.
- MAST light bracket installations were completed, enhancing navigational safety.
- The new MAST system, including lighting and electrical components, was fitted and wired, ensuring optimal functionality of navigation aids.
Installation of the rubber fendering systems was finalized, protecting the hull during docking and operational maneuvers.
Tail shaft and Propeller Service:
- Tail shaft propeller blue-fit for BV inspection was completed.
- Dripless seal installation was completed, guaranteeing a leak-free operation of the propulsion system.
Read more about this project in the November 2024 edition of arrowLife by clicking here.
I see this project as a great example of innovation and the right people coming together with a ‘can do’ mindset. Arrow has been a long-term service provider to Ledcor and has a proven track record to deliver on complex projects. The shipyard’s proximity to our facility in Richmond helped the team to actively manage the Bill L modifications.
Project Timeline: 18 months
The transition from a wet exhaust to an above-deck exhaust system required significant redesigns in the vessel’s structure to accommodate the new exhaust funnels and ensure they were compliant with safety regulations. This involved rerouting existing systems, reinforcing deck structures, and fabricating new exhaust mounts and brackets.