Using NOAA data the RLR diagram has been re-drawn. Primary benchmark is now B.M. ELV.8.06 FEET 3.734m above gauge datum. The previously used benchmark BM2 still remains but has been given its official title 161 2340 TIDAL 2 as it appears on the NOAA website. Value for 161 2340 TIDAL 2 is 6.347 in the NOAA report of 23.8.2000 and 6.346 in that dated 12.12.2003.