Chart correction 1920 — chart 2483
Chart 2483 (Panel B, Portsmouth Harbor) [ previous update 1474/23 ] NAD83 DATUM Amend light-buoy to, Q.R ’4’ 43° 04´·664N., 70° 42´·305W.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.