What is "doubling a cape"

Doubling \Dou"bling\, n.

1. The act of one that doubles; a making double; reduplication; also, that which is doubled.

2. A turning and winding; as, the doubling of a hunted hare; shift; trick; artifice.
   --Dryden.

3. (Her.) The lining of the mantle borne about the shield or escutcheon.

4. The process of redistilling spirits, to improve the strength and flavor.

5. raising the stakes in a game, such as a card game or backgammon, by a factor of 2.

   Syn: double.

   Doubling a cape, promontory, etc. (Naut.), sailing around or passing beyond a cape, promontory, etc.