The angle of the dangle is at right angles to the sag of the bag when the throb of the knob is a constant /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif
This means if your Ht of eye is 2m (I should be so lucky), the horizon is 2.0976 Nm away.
Or 2.569 Nm when @ 3m.
Since this is last one ain't much above the waterline when sitting in a cockpit, how come I can see the beach when known to be at around 4 Nm off (GPS etc position), when sailing across Poole Bay? Or is this an optical illusion.