Chart correction N31/23 — chart 71248

71248   4Ed.  03/23/19  LAST  NM  N18/23  N31/23 Add Buoy "STEUIS-1" Y, pillar, "X" topmark, Fl Y 4s [Q130.6]   1°18′30.6″N  103°58′30.0″E Buoy "STEUIS-2" Y, pillar, "X" topmark, Fl Y 4s [Q130.6]   1°18′30.0″N  103°59′37.2″E (6(37)23 Singapore)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 03/23/19

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