Chart correction 145 — chart 1227

Chart 1227 [ previous update 4401/23 ] NAD83 DATUM Insert the accompanying note, AUTOMATIC IDENTIFICATION SYSTEMS, centred on: 42° 55´·61N., 70° 57´·66W.

Source: UKHO Admiralty Notices to Mariners

Reference information — always verify against official Notices to Mariners before navigation.