Rainbow's End Anchoring

The weather suddenly changes. Your boat moves around and pulls on her anchor. Do you have enough scope? Did you use the right anchor? Rainbow's End Anchoring calculates the rode, scope, and anchor to use based on your boat, her gear aboard, the depth, the seabed, sea state, and your predicted winds. When the anchor is set, Rainbow's End Anchoring calculates the perimeter fence, and you can add a swing tolerance. Set the alarm, and if your boat drags outside the perimeter fence or swings too far, an alarm will sound aboard and for crew ashore. We built it aboard our ketch Rainbow, for the nights the wind shifts. THE PLAN • Scope measured from the bow roller to the seabed, with the tide still to rise. 8 ft of water under a 6 ft bow roller needs scope on 14 ft. • Depth corrected for how your sounder is calibrated. • Every anchor and rode aboard is checked twice: will it set in this bottom,…