- We specialize in Helix Mooring Systems installations and maintenance; from single point moorings, multi-point moorings, floating pier anchoring systems to mooring field layout and installations
- Installation and maintenance or Mushroom and Dor-Mor pyramid anchors
- Boat salvage and recovery
- Diving support for boat salvage and recovery in conjunction with marine contractors, TowBoatUS and Sea Tow
- Underwater maintenance of vessels and marine construction
- Underwater structural and hull surveying
- Propeller maintenance, repair, and sales
- Debris removal from public and private beach properties
Why we recommend Helix Mooring Anchors
- Versatile, high-load capability to serve any permanent anchoring need
- Holding power that cannot be equaled by traditional mushroom anchors or deadweight blocks
- Maintains its holding power even with the shorter scoping necessary in congested harbors
- Stays where it is put and is friendlier to the harbor bottom environment
The table below compares the holding power of different traditional mooring anchors with that of a Helix. This test was done by a 65 foot tug boat pulling laterally on each anchor until it failed. The Helix never failed. The 1.5 inch pulling hawser parted at 20,800 lbs. of load, however.
Vineyard Haven, MA, Pull Test Results
|Mooring Type||Bottom Condition||Breakout Force|
|350-lb. Mushroom||5 feet deep in mud||2,000 lb.|
|500-lb. Mushroom||in sand bottom||1,700 lb.|
|3,000-lb. Concrete USCG block||set in mud||2,100 lb.|
|6,000 lb. cement block||on sand bottom||3,200 lb.|
|8/10 Helix||soft clay mud||20,800+ lb.|
Helix anchors are built on a solid, square shaft measuring 1 ¾” on each side. It is hot-dipped galvanized for protection, and the top end includes a 1 1/8” shackle that encircles the shaft and connects to the anchor rode.
Because these anchors don't drag around the harbor bottoms and can be effective with shorter scopes, they are preferred in environmentally sensitive areas and have been recommended by some state agencies and scuba-diving tour companies.