Information on different types of, and manufacturers of, Environmentally Friendly Moorings (EFMs).
Moorings generally comprise three main parts, the anchor, the link (or rode) and the float. The constituent parts of a typical simplified traditional mooring are shown in Figure 1A. Some EFMs focus on individual constituents, particularly the rode, whereas other provide a 'complete' product (such as shown in Figure 1B), or a modification of a more traditional mooring (such as that shown in Figure 1C).
Figure 1: Traditional mooring (A), EFM with elastic rode and helical anchor (B), and EFM with chain floats (C)
There is no ‘one size fits all’ EFM. The suitability of the components chosen vary depending on local factors including water depth, tidal range, and wave energy. Early successes for EFMs were noted in Australia and the USA, but initial designs did not necessarily translate straight across the differing (environmental) scenarios in the UK. However as time has gone on, and new products and adaptations made, there are now EFMs that are suitable for swing moorings in many UK locations.
EFM Rodes and complete products
Ecomooring rodes or complete products include:
manufacturers listed here are for to show examples and provide a reference. It
is not an exhaustive list and these brands are not necessarily endorsed by the
organisations collaborating on these web pages.
Anchor types include:
Traditional mooring anchors, or gravity anchors (Figure 2 A,B,C), act as a weight on the seabed. To reduce the footprint on the seabed, an EFM replacement for such an anchor is to use an embedment anchor such as a helical (Figure 2D) that penetrates the seabed, with little surface area on the seafloor.
Figure 2: Types of mooring anchors
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