Chart correction N52/21 — chart 44366
44366 2Ed. 01/30/16 LAST NM N36/20 N52/21 Add Anchor berth “1” [N11.1] 60°18′39″N 27°59′05″E Anchor berth “2” [N11.1] 60°19′19″N 28°00′02″E Anchorage area “No 18K” [N12.2] bound by purple dashed line joining 60°18′35″N 27°58′07″E 60°19′48″N 27°59′53″E 60°19′24″N 28°01′00″E 60°18′11″N 27°59′14″E (46(4867)21 St. Petersburg)
Source: NGA U.S. Notice to Mariners · edition: 2Ed. 01/30/16
Reference information — always verify against official Notices to Mariners before navigation.