Braided line to secure to a dock in a storm is IMHO suicidal.

karl, you missed a small point. braided line is used _only_ for the safety
line taking all the load running through a chock, said braided line then
rolling hitched on to the three-strand line you are using.

you use braided line only for the parceled and served chafe protection because
braided line stretches less from bitt to chock and there saws less over the
chock.

three-stand line is, of course, the line you use to soak up the shock from boat
to dock in a storm, just as three-strand line is the line you use to soak up
the shock from from boat to well-set anchor in a storm.

you do set safety lines on your anchor lines when anchoring, right?