Chart correction N30/23 — chart 44178
44178 3Ed. 07/18/15 LAST NM N32/22 N30/23 (Panel B) Add Dangerous submerged rock [K13] 58°55′32″N 18°09′59″E (970(17724)23 Norrkoping)
Source: NGA U.S. Notice to Mariners · edition: 3Ed. 07/18/15
Reference information — always verify against official Notices to Mariners before navigation.