Chart correction N16/21 — chart 22173
22173 37Ed. 10/13/12 LAST NM N15/21 N16/21 Substitute Depth 5.9 meters Wk [K26] for dangerous wreck 12°02′34″S 77°09′55″W (See N24/19) Add Dangerous wreck [K28] 12°02′23″S 77°09′16″W (PER CH 2236)
Source: NGA U.S. Notice to Mariners · edition: 37Ed. 10/13/12
Reference information — always verify against official Notices to Mariners before navigation.