These
are USCG and ABYC standards (Amer. Boat and Yachting Council) The White
jacket (made of top grade polymer PVC) is required for marine grade and
the
tinning is to help reduce oxidation in salt air environment. ALL
connectors are protected with Adhesive Lined Polyolefin shrink tubing to
protect from moisture and to avoid avoid oxidation on the shield or
center conductor.