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Skrew Mooring Anchors

Skrew Mooring IllustrationAll along our coasts we have beautiful destinations with permanent moorings. Every year these destinations host hundreds, even thousands of passing ships. This massive concentration causes a deterioration of the sea bottoms, with lasting effects to the local ecosystem.

These repetitive moorings inevitably damage our underwater heritage. Upon each mooring, the boat anchors slide, bump, and churn up the bottoms each time the boat moves due to swinging, swell, wind, tide, etc. In the end, they tear off the flora when the boats leave which causes considerable and irreversible damage.

Sub aquatic life is in great danger, especially in the Mediterranean, where the Posidonia Oceanica is endangered (CF: posidonia protection decree, JO of 9/08/88.), as well as the proliferation of Taxifolia (Caulerpa Taxifolia) due to accidental spreading.

Why Use Skrew Moorings?

Installation of Skrew Moorings

The installation of a permanent SKREW mooring must respect the local legislation concerning the installation of mooring buoy.

The SKREW anchor does not lie on the bottom; it gets into the ground vertically until it perfectly shows through. The ground's mechanical resistance determines the kind of anchor and its size. Before installing, it is necessary to inspect the ground (the more solid it is, the higher the holding power).

Skrew Mooring Installation

For its installation, as well as for its removal, the SKREW anchor does not necessarily require special equipment or human means. Depending on the height of the water, the ground consistency, and your diving equipment, you can screw the SKREW anchor in the bottom with a tube going through the ring, while screwing the anchor. If necessary, get help from a professional diving team equipped with an adapted hydraulic tool (Skrew-Matic).

Buy Skrew Moorings Online

Anchor Sizing Chart

Skrew Model Boat Weight
Vertical Lift
Shank Length Shank Diameter Number of Disks
SK JET Jet Ski 19.7" (0.5m) 1.17" (30mm) 1
SK 1600 3.5 Ton
1.6 Tons
29.5" (0.75m) 1.56" (40mm) 2
SK 2500 8 Ton
2.5 Tons
39.36" (1.00m) 2.34" (60mm) 2
SK 3500 12 Ton
3.5 Tons
55.1" (1.40m) 2.34" (60mm) 2
SK 6400 12-18 Ton
6.4 Tons
55.1" (1.40m) 2.34" (60mm) 2
SK 8500 24 Ton
8.5 Tons
74.8" (1.90m) 2.96" (76mm) 3


  1. - For its inexpensive price, the helicoid mooring anchors' holding power is the best.

  2. - The anchor is made of hot-dipped galvanized marine steel for a long lifespan.

  3. - Unlike temporary anchors, these do not dredge on the sea bottom and do not require a great water height ration for the mooring line. They are thus respectful of the sea beds' ecology.

  4. - The "Skrew" anchor is made from high strength steel. The rod is forged of only one metal bar with a round eye fixation.

  5. - Installation is carried out using a bar passed through the eye.