The Veil Currents
The Veil Currents are a stretch of water between several islands of The Iron Coves where currents, fog, and reef combine into a natural concealment zone. A vessel that knows the specific channels can make itself effectively invisible to anyone who does not.
The Currents are used for staging ambushes, hiding from naval pursuit, and rendezvous between crews. They are a geographic feature rather than a settlement: nobody lives there, and everyone from the Coves knows them. See Piracy and Naval Warfare.