=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Woods Hole          960/165 RLR(1972) is 9.4m below BM11
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Aug-2011
Using NOAA data the RLR diagram has been redrawn. Primary benchmark remains BM 11 3.447m above gauge datum but has now been given the official name 11 1932.