Fortress Marine Aluminum Fluke Anchor Fortress Marine Anchors deliver professional-grade holding power through high-tensile aluminum alloy construction that matches steel strength at significantly...
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Add to CartBuilt for strength without the bulk, the Fortress Guardian Anchor is crafted from a corrosion-resistant aluminum-magnesium alloy that’s tough yet lightweight. Its compact profile makes it easier to handle than traditional steel anchors, while still offering serious holding power. Mud palms guide the flukes into the seabed fast, giving you a solid set across a variety of bottoms. Designed with the same precision as top-tier Fortress models, the Guardian skips the extra weight, but not the quality. Whether you're anchoring for a quick break or overnight stay, this anchor stands up to the elements without rusting or dragging you down. Ideal for anyone who wants reliable performance minus the steel upkeep.
Boat size recommendations are for boats of average windage and proportions to 30 knots of wind, average bottom conditions, and moderate protection from open seas. Note that the loads in 42 knots of wind are twice as much as in 30 knots. Use a three-strand nylon line, 6-12 ft of chain, and a minimum if 5:1 scope. A minimum of 6 feet of chain should be used for every 25 feet of water your boat is usually anchored in.
| Model | Weight | Boat Length | Shank Length | Fluke Length | Working Load | Holding Power in Hard Sand | Holding Power in Soft Mud |
| G-5 | 2-1/2 lbs. | 12'-16' | 19" | 11" | 350 lbs. | 1050 lbs | 210 lbs |
| G-7 | 4 lbs. | 17'-22' | 22" | 13" | 575 lbs. | 1725 lbs | 345 lbs |
| G-11 | 6 lbs. | 23'-27' | 25" | 15" | 750 lbs. | 2250 lbs | 450 lbs |
| G-16 | 7 lbs. | 28'-33' | 29" | 17" | 1075 lbs. | 3225 lbs | 645 lbs |
| G-23 | 13 lbs. | 34'-41' | 33" | 19" | 1625 lbs. | 4875 lbs | 975 lbs |
| G-37 | 18 lbs. | 42'-47' | 38" | 22" | 2500 lbs. | 7500 lbs | 1500 lbs |
| G-55 | 29 lbs. | 48'-53' | 43" | 25" | 3500 lbs | 10500 lbs | 2100 lbs |
| G-85 | 42 lbs. | 54'-62' | 48" | 28" | 4625 lbs. | 13875 lbs | 2775 lbs |
| G-125 | 65 lbs. | 63'-72' | 53" | 31" | 6000 lbs. | 18000 lbs | 3600 lbs |
Information provided by Fortress Marine.
Fortress Anchors offer a Lifetime Parts Replacement Warranty for the original purchaser against damage that may occur to any part(s) of the anchor. The warranty does not apply when:
https://fortressanchors.com/warranty/warranty-replacement-parts-form/
The Fortress Marine Guardian Anchor is made from a corrosion-resistant aluminum-magnesium alloy that offers strong holding performance at a lighter weight than traditional steel anchors. Its rustproof construction helps it stand up to harsh marine conditions.
Yes. The Guardian Anchor can be disassembled for easier storage, making it a practical option when space-saving stowage is important.
The Fortress Marine Guardian Anchor uses mud palms to help guide the flukes into the seabed quickly. This design helps the anchor achieve a solid set across a variety of bottom conditions.
Available Guardian Anchor models are recommended for boats from 12 feet to 72 feet, depending on the model selected. Review the product specifications to choose the correct anchor size, weight, and holding capacity for your boat.
Fortress recommends using a three-strand nylon line, 6 to 12 feet of chain, and a minimum 5:1 scope. The brand also recommends using at least 6 feet of chain for every 25 feet of water depth where your boat is typically anchored.
California Residents:
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov