What size boat can use a SRAF ?

Usually, smaller boats are not so inconvenienced by the antifouling problem, because they are easier and much cheaper to clean. That is why the SRAF is more targetted to boats over 10 meters (33 ft).

Is the SRAF system appropriate to areas where the tides are important ?

If the boat is out of the water at low tide, the current must be switched off, and that may be difficult to do. However, if there is enough water to keep the SRAF immerged, it's ok. Nb : boats over 10 meters (33 ft) are most targetted for using the SRAF, and those are usually kept immerged.

Can the SRAF be used while at sea ?

The boat does not really get dirty while at sea. It's when in comes to rest still that the micro organisms develop themselves. The SRAF is designed to be used when the boat is still. However, the system is portable (10 kilos), and can be carried on board to be used while cruising in areas other than its usual mooring.

How large is the protected surface ?

The protected zone is approximately  12 to 15 meters in diameter.

Are neighbouring boats also protected ?

Yes, if they are within the protected perimeter. That is the reason why smaller boats can group themselves to purchase the SRAF, thus reducing the individual investment.

What type of connection is necessary ?

The rectifyer works on 12v~, 24v~ ou 220 v=, and is installed inside the boat (machine room, small closet, etc). It is connected to the electrical system of the boat, or directly on the dock's outlet. A small plug can be installed near the ideal point of immersion, so it is easily connected and disconnected.

What if the SRAF is stolen ?

The SRAF is part of the boat's equipment. Just like a radar or an anchor. The most expensive part of the system is the rectifyer, which is inside the boat, therefore not visible.
In addition, the SRAF is completely immerged, therefore invisible.
Finally, it is normally covered by your insurance, like the rest of the boat's equipment.

What is the life expectancy of the SRAF ?

There is no known limit to the life expectancy of the system. Only the anodes must be replaced every 18 to 24 months, and they cost 350 €.

Can I replace the anodes myself ?

Yes, it is possible. But it is best that we do it together the first time. This is one of the resaons why we advise to subscribe a maintainance contract the first year, which includes the replacement of the anodes, as well as the proper adjustment of the settings. 

Does the SRAF need to be exactly in the middle of the boat or on the side ?

It does not matter... As long as the boat is withing the protected perimeter (12 to 15 meters in diameter). Most of the time, the SRAF is immerged on the side, attatched to the railings. It is only necessary that it is under the lowest point of the the keel - ideally 2 meters).

What type of interference should we expect to get between the SRAF and the other static eletricity and electrolysis problems already existing ?

None ! The quantity of electric current produced by the SRAF is so small, the system creates absolutely no interference with anything. Neither with the the usual cathodic protection, nor with eletronical equipments.

Does the SRAF also protects propellers, rods, etc ?

Yes it does. All materials are protected when placed in the protected area of the SRAF. Including harbour structure, ropes, etc.

Does the SRAF solve the osmosis problems ?

Indirectly, the problem is reduced, because the SRAF prevents the accumulation of organic material on the Gel Coats, thus reducing the phenomenon. But this problem being due to the actual properties of the Gel Coat, it cannot be aliminated.

Does the SRAF clean a dirty boat ?

NO. The SRAF does not do miracles ! But it prevents completely the growth of shells and algae on a clean hull.

Do we still need an antifouling paint ?

It is no longer necessary. You can simply use a protection paint, or even a paint that improves gliding for races.

What is the best moment to install a SRAF ?

When the boat is returned to the water after being uphauled and cleaned. Or when new.

How long does the installation take ?

It can be done in half a day.

I have heard that antifouling paints are about to be prohibitted in certain countries of Europe ?

It is true, notably in Holland, because of their strong polluting effect (mercury, lead).But until a replacement option is available, the deadline has been postponed to 2005.
The SRAF will be possibly soon the only protection allowed there. That is why many harbours are interested in a global protection, which also protects all immerged structures.

How can we protect a boat over 15 meters long ?

By installing two, or even three elements. You must take into account the lengh of the immerged area and its depth. However, there will be only one rectifyer, only more powerful.

22.06.2004 | Imprimer cette page | Recommandation