Chart correction N17/23 — chart 37231
37231 19Ed. 11/12/11 LAST NM N16/23 N17/23 Delete Depth 6.5 meters 53°44′31″N 8°02′34″E Relocate Buoy "M 12A" from 53°45′53″N 8°05′14″E to 53°45′28″N 8°05′08″E Add Depth 14.6 meters 53°47′24″N 8°08′15″E Depth 12.7 meters 53°47′47″N 8°08′42″E Depth 3.3 meters 53°44′28″N 8°02′28″E and extend depth contour (5-meter) E to enclose (DEU CH 1230)
Source: NGA U.S. Notice to Mariners · edition: 19Ed. 11/12/11
Reference information — always verify against official Notices to Mariners before navigation.