The donut modular system typically comprises of 2 or 4 removable and interchangeable modules which rotate around a central steel skeleton or frame. A nett buoyancy range from 4T to 40T is achievable.

The buoyancy modules (donuts) are constructed by spiral winding and thermo-laminating polyethylene foam onto a central steel spool, producing an energy absorbing core which is then encapsulated within a tough polyurethane elastomer protective skin. The resilient core ensures that the buoy is completely self fendering and the buoy is also resistant to abrasion and ultra violet degradation.

The Modular Anchor Pendant Buoy systems can be manufactured to suit any specific size or buoyancy requirement. Although standard production colors are yellow or orange, NANHAI will manufacture modular buoys in other colors to meet specific customer requirements. Optional items include internal radar reflectors, reflective tape and navigation lights.