Specifications
81
drag. As alternative to anti-fouling paint we supply buoys with a Cunifer10 hull. Cunifer 10 is a
copper-nickel alloy which does not pit and reduces fouling.
Paint may be applied on a AISI316 hull for protection against pitting, better visibility or
because of navigation regulations. For painting we recommend the Brantho Korrux “3 in 1”
(RAL 1023) paint system which has proven its quality in a maritime environment.
After removing the fender, degreasing the hull, making it dust free and covering flange,
handles and mooring eye, Brantho Korrux can easily be applied in 3 layers without sanding the
previous layer. Each layer needs to dry for 48 hours before the next layer can be applied. After
the third finishing layer the paint must be allowed to dry for at least 2 weeks before mounting
the fender. Brantho Korrux is available in cans of 750 ml (painting materials and instructions
are included).
For galvanic and anti-fouling reasons we strongly advise to paint only the upper half of a
Cunifer10 hull.
5.9.3 Mooring eye
The mooring eye is located underneath the hull and is used to attach the mooring. It is made of
the same material as the hull and has a sickle shape. For Cunifer10 a Celeron block on the
mooring eye must be used, see subsection 5.8.8.
5.9.4 Fender
The fender serves no wave measuring purpose, although it may damp resonant pitching, rolling
and immersing somewhat. It mainly protects users from the sharp welding edge of the two hull
semi-spheres when handling the buoy on deck or in a laboratory. It measures 0.46 m, 0.78 m or
1.00 m for the various hull diameters. To inspect for corrosion under the fender you may force it
off and on.
5.9.5 Anti-spin triangle
To protect the motion sensor in the DWR-MkIII and WR-SG, the installation of an anti-spin
triangle is highly recommended in the following situations: if nearby passing ships are to be
expected or if the buoy is transported out of its packing frame. The DWR-G motion sensor is
not susceptible to spinning and therefore an anti-spin triangle is not required. Figure 5.9.1 shows
how to place the triangle on the fender and fasten the bolts. Sacrificial anodes that fit around the
tubes are available to protect the stainless steel triangle from corrosion.