Why a Floating Marker Needs a Heavy Seabed Anchor
A navigation buoy is not fixed in place like a post. Wind, waves, and currents push its floating body in different directions, so it needs an anchor system that can resist those forces while still allowing it to move with the water. The concrete sinker supplies the mass; a chain connects it to the buoy.
How the Weight Keeps the Buoy in Position
The sinker rests on the seabed, where its weight and contact with the bottom help keep it from sliding. When a current pulls the buoy, the chain tightens and transfers that pull to the sinker. A sufficiently heavy anchor is less likely to be dragged across the bottom, which helps the buoy remain near the location it is meant to mark.
The chain is not simply stretched taut. Its weight and curve give the buoy room to rise, fall, and drift within a limited area as conditions change. That movement is essential: a rigid connection would transfer every wave’s motion directly to the anchor and place greater strain on the system.
A Marker With a Working Radius
Because the buoy can move, it marks an area rather than a perfectly motionless point. The anchor and chain have to be matched to local conditions, including water depth, seabed, and the forces the buoy is likely to face. The concrete block’s job is not to stop the buoy from moving, but to keep that movement bounded. That balance lets the marker flex with the sea while remaining useful to vessels navigating around it.
