Fortress Marine Guardian Anchor

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Fortress Marine Guardian Anchor

The Fortress Guardian Anchor provides excellent quality and reliable performance, but at a more affordable price. Made from the same high tensile, corrosion-resistant aluminum magnesium alloy and manufacturing precision as Fortress’ top-of-the-line anchors, the Guardian has smaller extrusion profiles yet its efficacy is a competitive yet more affordable alternative to heavier, rust-prone steel anchors. Fortress Guardian aluminum anchors feature mud palms which are designed to allow the anchor set faster in any sea bottom. Mud palms enable the flukes to point more directly to the seabed.


  • Fortress Guardian Anchor’s aluminum alloy composition is as strong as steel, but only half the weight.
  • Easy to manage weight
  • Rustproof
  • An affordable alternative to heavy steel anchors
  • Can be disassembled - Easy to store
  • 1-Year Manufacturer’s Parts Replacement Warranty
  • Made in the USA

Guardian Anchor Selection Guide

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.

How to Set a Fortress Guardian Anchor

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:

  • Repairs have been made or attempted by others
  • Unauthorized modifications or alterations have been made
  • The anchor has been used to moor a vessel larger than the size recommended for a particular anchor by Fortress Marine Anchors
  • The anchor has been abused, misused or improperly maintained
  • The anchor has been used for military applications

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Product MPN:
G-11, G-125, G-16, G-23, G-37, G-5, G-55, G-7, G-85
Product UPC:
647124340119, 647124341253, 647124340164, 647124340232, 647124340379, 647124340058, 647124340553, 647124340072, 647124340850

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