These buoys by Anchor Marine can serve many purposes on board. The small flourescent marker buoy can hold up an anchor tripping line, mark out a water ski course or ensure a mooring line is visible for an easy pick-up. Main Uses: Mooring companions and marking lines or courses Size Weight Buoyancy 150 x 200 mm 0.3 kg 15 kg 250 x 280 mm 0.6 kg 25 kg