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Vessel modifications – Making good boats better

There is no such thing as the perfect boat. Boats are always a compromise. As designers we sacrifice performance to improve stability, we sacrifice stability to comply with transport regulations, we sacrifice efficiency to incorporate the necessary accommodation. Everything is a compromise and at the end of the build we hopefully have a vessel that reasonably satisfies all of the requirements.

Sometimes however the compromise isn’t as good as it could be. Stability, particularly dynamic stability in small aluminium vessels can often be less than ideal. Often owners are chasing good seakeeping which leads designers to incorporate increased dead rise angles. This can lead to hull shapes that display dynamic roll instability. This is that unnerving phenomenon where a boat, at speed, suddenly heals to one side or another and stays there, even in calm water. Often the only way to get the boat back to an even keel is to slow down.

Naval Architecture and Marine Solutions (NMS) has experience with correcting this phenomenon on vessels of varying sizes and configurations.

We recently prepared the detailed drawings for a set of sponsons that were fitted to the 7.6m “Haymaker”. The project involved developing the concept, measuring the hull, preparing the plate development and detailing the construction drawings for the sponsons.

The finished vessel turned out better than expected. By incorporating the sponsons into the original paint scheme they appear as though they were always part of the boat. On the water the owner is delighted with the results. He now has the confidence to come home in a quartering sea without fear of things getting unnecessarily exciting.

Vessel modification - Naval Architecture and Marine Solutions

Modification blends well into existing paint scheme

If you have a vessel that you feel could be improved upon then Naval Architecture and Marine Solutions are always happy to discuss what can be done.

 

Vessel modification - Naval Architecture and Marine Solutions

Modification to correct dynamic roll instability

Vessel modification - Naval Architecture and Marine Solutions

Sponsons improve the feel of the boat in a seaway

Vessel modification - Naval Architecture and Marine Solutions