Positions quoted in this Temporary Notice reproduced below are referred to WGS84 or a compatible datum and may be plotted directly on this ENC. Some or all of the information contained in this Notice to Mariners may have been included on the ENCs affected. 4253(T)/24 VIETNAM —  Buoyage. Submarine pipeline. Works. Source: VMS-South Notice 183/24 1. Special mark light-buoys, Fl(4)Y.12s, have been temporarily established, marking submarine pipeline laying works, in the following positions: Designation Position V1 12° 13' .15N. , 109° 12' .58E. V2 12° 13' .36N. , 109° 12' .67E. V3 12° 13' .47N. , 109° 13' .38E. V4 12° 13' .42N. , 109° 13' .82E. 2. Mariners are advised to navigate with caution in the area. (WGS84 DATUM)