Harness the sea

Our Anti-shock Variable Ballast (AVB) system utilises the sea itself to provide greatly improved stability and performance for high-speed craft. Drawing water into a forward bow tank enables the helmsman to take control of the vessel's LCG, shifting the centre of gravity forwards when required. This has numerous benefits, including:

  • Greatly reduced slamming and vertical acceleration.

  • Protection against acute and chronic injury caused by impact and whole-body vibration (WBV).

  • Higher speeds in rougher conditions.

  • Stability at speed and in rough seas.

  • Getting onto the plane faster.

  • Lowering the bow for improved helm visibility.

  • Punching through waves.

  • Improved crew performance.

  • Expanding the craft's operational envelope.

LI42940Helvick Head Atlantic 8.jpg

Proven in the field

Our system has been used by rescue teams in the toughest conditions for nearly 20 years. The regular positive feedback that we receive from these crews is backed up by data, with live sea trials proving what our users already know; that our AVB system significantly reduces impact.

These trials, conducted using and RNLI Atlantic 75, demonstrate the difference in performance between an empty bow tank (or effectively not having an AVB system installed) and a full bow tank. The distinction between the two is plain to see; the average levels of Z-axis vertical acceleration are reduced by half, whilst the more extreme impacts are reduced by approximately 75%. 

This reduction of motion across every axis clearly demonstrates how effective our AVB system can be at protecting crews from slamming and WBV.

Bridge performance gap

We've always said that there's no such thing as a perfect boat, only the right boat for the job at hand. Designers and operators of high-speed craft therefore have a choice to make; do they want a lighter, faster, and more fuel-efficient craft, or do they want one which is heavier and slower, but with greater seakeeping in adverse conditions?

Our AVB system almost eradicates this issue, as it enables operators to utilise the benefits of both lighter and heaver craft. A lightweight boat can take on strategically positioned ballast as required, gaining the seakeeping capabilities of a much heavier craft. Concentrating the weight at the bow provides greater leverage than if the hull itself was heavier, meaning that less overall weight is required.

This results in a much more flexible craft, better suited to a wider range of applications, with an expanded operational envelope.

LI39934Relief Atlantic 85 insh.jpg