This IENC Chart Overlay has been created by USACE New Orleans District. Its coverage is for the Mississippi River's Southwest Pass to the Gulf of Mexico from river miles 13.4 AHP to 22.0 BHP, Wilkenson to Smoke Bend, Belmont and Fairview.
These overlays represent channel conditions based upon soundings and depth contour data extracted from most current USACE surveys and compiled on weekly basic.
The overlays intended for use as in conjunction with the most current NOAA ENC Download US4LA30M used as the base chart, as well as, NOAA Paper Chart 11361
(available only in S57 format)Download Southwest Pass Overlay