Anchors are heavy metal weights dropped from the side of boats to keep the vessel from moving while at sea. Although the double-hook design, called a grapnel, is the most common image of an anchor, they can also come in a mushroom shape as well. Anchor manufacturers include recommended sizing; however, as other factors such as the length of the boat and wind conditions are a factor in boat mooring, these recommendations should only be used as a starting point when considering which anchor to purchase.
- Skill level:
- Moderately Easy
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Things you need
- Tape measure
- Boat manufacturer's specifications
Measure the length of your boat or look it up in your boat manufacturer's manual. Anchor weight for a boat that is 20 to 25 feet long should be at a starting weight of 15 Yachtsman pounds. For each additional five feet of boat length, the weight of the anchor increases by 10 Yachtsman pounds.
Determine the weight of your boat by looking it up in the manufacturer's specifications or by having it weighed at dry-dock in the marina. Generally, a 15,000 pound boat requires an anchor weighing 50 Yachtsman pounds, and the weight of the anchor increases or decreases by 5 Yachtsman pounds for every 2268 Kilogram of boat weight.
Adjust your anchor weight depending on the shape and purpose of your boat. A box shaped house boat or tug boat will require a larger anchor to compensate for wind drag than a speed boat of the same weight.
Tips and warnings
- Consult with an expert at your local marina for additional advice.
- Always follow your manufacturer's warnings and instructions when purchasing equipment for your boat.
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