Aids to Navigaton
NORNAV NN2000 & NN 2500 - NAVIGATION BUOYSThe NN2000 & NN2500 navigation buoys are constructed from rotationally moulded medium density polyethylene, pressure foam filled to a density of 36 kgs./ cu.m. and finished in IALA compliant colours. The material is UV resistant and designed to give a colour fast life of up to 10 years. All buoys are finished with two coats of environmentally acceptable anti-foul paint below the water line. The buoys are fitted with a balance keel and anti-spin fins, which also provide the mooring points and are finished in galvanised steel. The NN2000 has three separate buoyancy chambers and the NN2500 four (fitted onto a galvanised steel frame). The hulls are through bolted with M33 bolts (three per hull section) to connect keel and top plate. Towers comprise of a galvanised steel frame, clad with polyethylene panels. Size and shape can vary according to specifications. All NorNav buoys are designed to be in inherently stable (see GZ plot). Lanterns, solar panels, radar reflectors and battery systems are fitted to clients specifications using a bespoke wiring loom. |
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Buoy Data |
NN2000 |
NN2500 |
Diameter |
2000 mm | 2500 mm |
Hull Height |
1000 mm | 1500 mm |
Keel Depth |
800 mm | 1000 mm |
Total Draught |
1300 mm | 1750 mm |
Std. Focal height |
2270 mm | 3000 mm |
Lifting Eyes |
4 | 4 |
Mooring Points |
Up to 4 | 4 |
Weight in Air |
990 Kgs. | 2380 Kgs. |
Max. Chain Weight |
750 Kgs. | 1600 Kgs. |
Reserve Buoyancy |
2160 Kgs. | 3510 Kgs. |
NORNAV NN 1250, 1500 & 1800 NAVIGATION BUOYSThe NorNav series of buoys are manufactured from rotationally moulded medium density polyethylene, pressure foam filled to a density of 36 kgs./cu.m and finished in IALA compliant colours. The material is UV resistant and designed to give a colour fast life of up to 10 years. All buoys are finished with two coats of an environmentally acceptable anti-foul paint below the water line. The buoy is fitted with a balance keel and anti-spin fins which also provide the mooring points and can be finished in galvanised mild steel or 16L stainless steel. The hull is through bolted with M33 bolts to connect keel and top plate to the tower. Towers are constructed form galvanised steel or stainless steel and clad with polyethylene panels to provide pillar or day shape configurations. All NorNav products are designed to be inherently stable (see GZ plot). Lanterns, solar panels, radar reflectors and battery systems are fitted to clients specification using a bespoke waterproof wiring loom. |
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Buoy Data |
NN1250 |
NN1500 |
NN1800 |
Diameter |
1250mm | 1500mm | 1800mm |
Hull Height |
800mm | 800mm | 1000mm |
Total Draught |
1200mm | 1200mm | 1400mm |
Std. Focal Height |
1770mm | 1770mm | 2175mm |
Lifting Eyes |
4 | 4 | 4 |
Mooring Points |
2 | 2 | 2 |
Weight in Air |
480 Kgs. | 640 Kgs. | 800 Kgs. |
Reserve Buoyancy |
1090 Kgs. | 1245 Kgs. | 2020 Kgs. |
Max. Chain Weight |
350 Kgs. | 450 Kgs. | 650 Kgs. |
The Norfloat range of navigation buoys and lantern towers forms the basis for The NorNav Range, included within this range are also the Nornav marine lanterns and solar charging systems together with mooring equipment and more general aids to navigation products.
The NorNav range of Navigation markers are designed and manufactured in-house within our modern factory in the U.K., to provide reliable, efficient and cost effective solutions to all inshore and coastal buoyage requirements.
At present the NorNav range consists of IALA compliant markers in sizes of 1.0m, 1.25m, 1.8m, 2.0m and 2.5m diameter for all inshore and coastal applications, including: lateral markers, isolated danger and safe water marks, cardinal marks and special marks. These are all available either lit or unlit. In most configurations the floating hull unit is manufactured from rotationally moulded medium density polyethylen, with long lasting colouring and U.V. protection.To creat an unsinkable structure the hull is also pressure injected with two part polyurethane closed cell foam.
The NorNav marine lanterns and solar power systems are chosen to meet the most stringent customer requirements world-wide.
The steelwork contained within all NorNav polyethylene hulls and shore line towers and posts, incuding the NorNav 'NorKeel' stabilising unit and buoy lantern tower, are hot dip galvanised for long life, and the design incorporates special features to make routine servicing as efficient and quick as possible.
Norfloat also manufacture more traditional buoys with steel hulls in sizes up to 2.5m diameter. In all cases the dayshape and lantern tower is fabricated from quality steel, hot dip galvanised The day shape towers have standard panels moulded from coloured GRP, but marine plywood can be specified as a customer option. All marker buoys of 1.8m diameter and above are fitted with bespoke fendering for added protection as standard, smaller sized buoys can also be fendered as a customer option.
Photograph shows : Standard NorNav lantern, Firdell radar reflector, Solarex panels, GRP dayshape panels and the heavy duty lifting eyes.