1250 Plastic Navigation Buoy

Our 1250mm plastic navigation buoy is the descendant of the world’s first plastic buoy designed in 1985. Originally manufactured for the Scottish Fish Farming industry as an alternative to traditional steel buoys they were designed to be used in relatively sheltered waters, primarily open sea lochs.

The current incarnation of the 1250 navigation buoy is manufactured from a single piece rotationally moulded float collar filled with closed cell foam for unparalleled floatation properties. Equally capable of being deployed in ports, harbours, rivers & inland waterways.

The 1.25m buoy can be fitted with an Echomax MIDI or Echomax 230 radar reflector with a capability of giving a peak RCS of 16 or 24m2.

Key Dimensions
Diameter mm 1250
Overall height mm (excluding top mark) 1940
Overall weight Kgs LIT with charging system 120
Overall weight Kgs UNLIT 96
Focal Plane (FP) in mm (typical) 1790
Maximum mooring weight Kgs 220
Minimum mooring weight Kgs 120
Waterline above datum mm (typical) 250
Chain size mm (typical) 16/19
Sinker weight in water Kgs (typical) 500
Depth guide 0-10 Mtrs

Typical chain length 2 to 3 times depth in most circumstances.

Mooring Steelwork

Designed for long life and manufactured from grade 40 mild steel, M36 threaded rod, with top and bottom sandwiched plates with M36 bow nut welded to bottom plate and threaded rod. Hot dipped after manufacture to BSE ISO 1461-1999.

Float Collars

One piece rotationally moulded, specially formulated extra high UV stabilised polyethylene. Foam filled with marine grade safety approved foam. Complete with two moulded lifting eyes.

Service Exchange Tower (SET)

Rotationally moulded specially formulated extra high UV stabilised polyethylene.

SET Optional Extras

Charging system: One x 60A/h or 100A/h gel battery, up to four solar panels, one regulator housed in IP67 rated box secured to battery mounting plate. Plugs are all Bulgin Buccaneer 400 mini series IP67 rated.

Top Mark

Can or cone powder coated to match buoy, complete with lantern support bracket manufactured in marine grade aluminium.


Any suitable preferred manufacturer compatible lantern can be fitted.

Radar Reflector

Echomax Midi giving a peak RCS of up to 16m2 reflection. Echomax 230 giving a peak RCS of up to 24m2 reflection. Both are secured in the SET.


To achieve the best results for stability and self righting the buoy must have a minimum of 120Kgs of mooring chain weight suspended below the buoy. Four point mooring also available with in-built ballast weight. Galvanised to BS EN ISO 1461-1999.

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