Chart correction N30/20 — chart 97337
97337 1Ed. 7/21/11 LAST NM N29/20 N30/20 Add Bottom characteristic “R” [J9.1] to depth 6 meters 31°45′54″N 130°10′44″E (JPN CH W207)
Source: NGA U.S. Notice to Mariners · edition: 1Ed. 7/21/11
Reference information — always verify against official Notices to Mariners before navigation.