The deck and the hull are assembled and equipment inside the boat has been installed. The time has arrived for the Seventy 7 to leave the production area where it has been for several months for mast stepping, the final phase for preparing Lagoon's newest ship before its launch.
The mast is positioned horizontally to position the spreaders, attach the rigging and cables, install the electrical systems and put the main sail in place. A crane will then lift it and place it in its shoe. Pascal Monnier, ship chandler and rigger for Lagoon explains…
What are the stages of mast stepping?
Fitting the deck
Before mast stepping, the deck must be fitted, including installing the winches, cleats and blocks… all the equipment needed for the standing and running rigging.
Next, the mast is prepared by positioning the spreaders and standing rigging, and attaching the running rigging. Afterwards, we install the electronics and electricity (radar, antennas and lighting) and prepare the hydraulic furlers. Then we prepare the boom (attach sheets and reefing lines) and install the main sail. We finish by placing the slings and verifying the shafts.
The actual mast stepping phase requires five people and is done on dry dock. It begins by slinging the mast which is strapped up and attached to the crane to be lifted in vertical position and placed above its position. Once in place over its shoe, it is connected to the stays, lower and intermediate shrouds and detached from the crane.
To finish, the lower and intermediate shrouds are tightened and the initial adjustments are made. The final adjustments are performed after the launch.
Characteristics of the rigging of the Seventy 7
The Seventy 7's rigging consists of:
- Aluminium mast with three spreaders. Height 32 metres
- Aluminium boom (optional carbon canoe boom)
- Standing rigging made of Kevlar
- Running rigging made of Dynema
- Genoa hydraulic furler
For more details about the sailing plan, see this article.
Pascal Monnier joined CNB's boat building yard in 2006 when the deck of the Lagoon 500 were being fitted, and has since held various positions in the yard. Since 2010 he has shifted to the more technical role of rigger, which requires advanced knowledge of the sea and a sound understanding of loads and forces.
Pascal participates in testing boats before delivery to customers to verify rigging and all adjustments. He also sails his own boat, which is docked at La Rochelle.