I think that one of the issues here is the use of very long Dyneema mooring
pennants. if they part, or if the anchor
drags into significantly shallower water
, we are left with a long floating line, snaking about on the surface. This makes the likelihood of a vessel encountering and snagging the buoy far greater than if the pennant was chain or non-floating line. I further suspect that this is what happened in the Red Sky case. Apparently the buoy was still flashing when caught against the hull
of Red Sky, as reported by the rescuing vessel (and in fact,if it was the same buoy, still flashing when it was recovered by the fishermen). this suggests to me that Red Sky initially encountered not the buoy itself (their lookout would likely have seen and avoided it), but rather the floating pennant, which became caught in their appendages and eventually dragged the buoy into contact. No proof of this, but it is a reasonable hypothesis IMO.
I certainly understand the desire to use Dyneema
... I use it a lot myself, but this practice on the part of a Government
backed enterprise is creating hazards to navigation
and causing damage to innocent mariners. I wonder if a practical alternative is available, one besides finding the operator of the buoys liable for their consequent damage to others?