Anchoring well is a skill that separates confident boaters from anxious ones. Here's how to do it right every time.
Look for: protection from the forecast wind direction, adequate depth for your draft at low tide, good holding bottom (sand or mud, not rock or grass), room to swing without hitting other boats or shore, and an escape route if conditions change.
Check the chart for the bottom type. Sand and mud offer the best holding. Rock and coral are poor. Grass can prevent the anchor from setting.
Scope is the ratio of rode deployed to total vertical distance (water depth + bow height above water). Minimum scope: 5:1 in calm conditions, 7:1 for overnight, 10:1 in storms.
Example: 10 feet of water + 4 feet of freeboard = 14 feet vertical. At 7:1 scope, deploy 98 feet of rode. Round up to 100.
All-chain rode allows slightly less scope (reduce by 1-2) because chain weight creates catenary that keeps the pull horizontal on the anchor.
Motor slowly to your chosen spot, heading into the wind. Stop the boat. Lower (don't throw) the anchor until it hits bottom. As the boat drifts back, pay out rode smoothly. When you've deployed the target scope, cleat off and let the boat tension the rode.
Back down gently in reverse at idle. Watch a landmark on shore. If the landmark stays steady, you're holding. If it moves, the anchor is dragging. Increase scope or re-anchor.
Set your anchor alarm (GPS or phone app). This is non-negotiable if you're sleeping at anchor.
Calculate your scope automatically at informedboating.com/forecast/anchor.
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