Chart correction 4187 — chart 1528

Chart 1528 [ previous update 3994/25 ] NAD83 DATUM Insert GfFl.Y.2s 'B' 42° 20´·509N., 71° 01´·919W.

Source: UKHO Admiralty Notices to Mariners

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