Chart correction 1851 — chart 2492

Chart 2492 [ previous update 1726/25 ] NAD83 DATUM Insert GfFl.Y.4s ´DMON´ 42° 31´·0N., 70° 32´·0W.

Source: UKHO Admiralty Notices to Mariners

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