Back to the first page of this website

OUR MOORING SYSTEM:  WHAT IT LOOKS LIKE

We have  developed  a new and improved mooring that will, instead of destroying habitat, materially enhance the habitat for  sea life around your mooring installation.  The basic mooring is  two railroad wheels spaced  six to eight  inches apart vertically, providing several cubic feet of shaded hidey-hole for fish, octopusses, etc.,  Our new mooring is called a "MICRO-HABITAT MOORING SYSTEM."

Our mooring system minimizes a number of big problems associated with more traditional mooring systems: 1) chain corrosion; 2) sea-life growth on the mooring components; 3) wave and wind shock loads on your boat's deck cleat and other equipment 4) loss of effective weight of the mooring anchor due to the inherent buoyancy of all materials when immersed in water; 5)  "footprint" on the sea bed; and 6) scouring of the seabed by the constantly moving mooring line.   In addition, it minimizes habitat damage and actually materially enhances that habitat.

    CHAIN CORROSION  Using a nylon mooring line almost completely removes corrosion from the mooring equation, most importantly in the near-surface oxidizing environment where most chain systems eventually fail.  We use galvanized shackles and swivels at the float and anchor end as there is no other good option for those points for now.  We use 3-feet of 1/2 inch galavanized proof chain to run through the mooring float and this is sufficiently oversized that this chain and the other very oversized components have approximately zero chance of failure due to wear or corrosion in between each year's inspection.   Metal components  below the oxidizing layer of ocean water and especially on the bottom, do not "oxidize" because they are typically in a "reducing environment."

    SEA LIFE GROWTH ON COMPONENTS Large pesky sea life like mussels seem to shun the nylon, possibly due to its constant small stretching/relaxing motions which may make it difficult for them to get a foothold.  The jury is still out on this and time will tell if this is truly the case.

    WAVE AND WIND SHOCK LOADS ON YOUR BOAT'S GEAR    Nylon provides  a superior stress-relieving elastic property that greatly reduces the jerks and snaps transmitted from the mooring to your boat's mooring cleat.  The big-boat (tug boats, freighters etc) operators have recognized this for years and have utilized the inherent elasticity (and corrosion resistance) of fabrics like nylon to more evenly distribute shock loads while towing etc.
Chain has essentially no inherent elastic property.  Our one-inch 30,000-pound breaking limit nylon has over 40% stretch before it even comes close to its breaking point.

    LOSS OF EFFECTIVE ANCHOR WEIGHT  As you may recall from your high school physics, all materials immersed in a fluid (in this case sea water) lose weight due to the inherent buoying property of the water acting on the immersed body (remember Archimedes and the gold in the king's crown?  and Archimedes thinking about how the water rose and overflowed when he took a bath??  http://en.wikipedia.org/wiki/Buoyancy)  Anyway, the closer the density of the object being immersed to the density of the fluid, the more that object is buoyed up by the fluid.  Now, by buoying we do not mean "floating"; we mean loss of effective weight.  For example, we all know that a rock (about 2.5 times the density of water) sinks "like a rock" (sorry, could not avoid the pun).  Ice, however, being frozen water, is just slightly less dense than water and thus it floats, but just barely:  most of an iceberg is under the water where you cannot see it.
    Many of other mooring systems use concrete as the mooring anchor.  We use steel.
    Concrete buoyancy  Typical concrete, without any other material inside like steel, loses around 40 percent of its air-weight when immersed in fresh water.  When immersed in the slightly more dense sea water, it loses slightly more.  So, if you now have a 2,000 pound (air weight) chunk of concrete on the bottom as your anchor, you really only have about 1200 pounds holding your boat.
    Steel  Camano Sail and Power uses steam-cleaned steel railroad wheels covered with a non-toxic rust-resistant rubber coating for our anchors.   The much denser steel loses only about  10 percent of its air weight.  These 38-inch steel wheels weigh  750 pounds each in the air.  In sea water they still weigh  around 675 pounds each.  We  weld two wheels together for the typical mooring, which then has an immersed weight of approximately 1350 pounds. 

    FOOTPRINT ON THE SEA BOTTOM    Our steel "Micro-habitat" mooring anchor, due to the higher density of steel compared with e.g. concrete, occupies a far smaller footprint for the same effective holding power compared to the large concrete ecology blocks used by others.  Additionally, the three-feet long lower stem extension penetrates the seabed, creating even greater holding power

    SCOURING OF THE SEA BED         The nylon mooring line is completely buoyed off the bottom,. even at low tide, eliminating destructive scour of the sea bed.
PICTURES OF A "MICRO-HABITAT MOORING SYSTEM