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R&D projects
Brevet ATAP : Appontement temporairement auto-protégé

ATAP: Temporary automatic protection for landing stages

Yachting harbours in France are struggling to find room for all the boats that need to use them. To help solve their problems BRL Ingénierie invented ATAP - (Appontement Temporairement Auto-Protégé) which means temporary automatic protection for landing stages against the swell thanks to an automatically triggered or controlled pneumatic wave-breaker.

The system is now INPI patented. To optimize its sizing, BRL Ingénierie had several sets of physical tests carried out in a wave flume. The modelling work was financially supported by Oséo-Innovations.

The ATAP system is suitable for boats that are 15 to 40m long (medium and large sailing craft) on short stopovers (boat shows, luxury yacht races) and for passenger ferries or tender boats transferring cruise passengers ashore.

Because it has very little impact on the sea bed, it can usually be used even when posidonia grass beds are present.

A similar pneumatic wave-breaker device can be stowed on board liners to allow cruise passengers to board a tender vessel. This device is called “DAHET” (Dispositif Atténuateur de Houle Embarqué pour Transfert de passagers meaning “on-board swell-attenuator for passenger transfers”. The corresponding patent has also been registered with INPI.

DAHET and ATAP are both environment-friendly systems. What is more, they are totally in line with sustainable development concerns as they allow cruise operators to provide continuous service:

- DAHET is a safe, convenient way of transferring cruise passengers from a liner to a tender vessel.

- ATAP then allows them to disembark from the tender vessel to their onshore destination without encumbering the port.

© Copyright, Paris, 2007, BRL-Ingénierie, JM. Beynet

Contact: Gilles Rocquelain


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 The concept in synthetic images
Wave flume modelling