Chart correction 31/23 — chart 550

550   7Ed.  02/09/85  LAST  NM  22/23  31/23 Delete Depth 1398 fathoms   21°41′N  118°56′E Depth 1290 fathoms   21°45′N  118°42′E Add Depth 22 fathoms enclosed by depth contour (30-fathom) centered   21°43′N  118°53′E Depth 22 fathoms enclosed by depth contour (30-fathom) centered   21°30′N  118°49′E Depth 1004 fathoms   21°34′N  118°59′E (UKHO ARCS 1968-0)

Source: NGA U.S. Notice to Mariners · edition: 7Ed. 02/09/85

Reference information — always verify against official Notices to Mariners before navigation.