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The mussel longline is a horizontal subsurface buoy mooring, combined with a suspended mussel growout harness. Parallel growout ropes are suspended from the longline as
well as growout socks arranged in hanging loops. Weak links are installed at the bottom of the loops to allow escape, if a marine mammal should get entangled. All mooring
components are selected and sized for long term durability. The longline operates in a submerged mode to avoid the destructive effects of surface waves. The upper portion of
the longline is raised to sea level during inspection and harvest operations. Flotation is added as the growout of mussels increases the suspended weight. Separate surface guard buoys mark and protect the site.
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