=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Rockland 960/186 RLR(1974) is 10.3m below BM1 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993 Rockland 960/186 RLR(1974) is 10.3m below BM1 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 15-Feb-2012 Rockland is now an Historic station. Last data received was for 1987.Primary benchmark on the original RLR diagram was BM 1 this no longer appears on the NOAA website. Last Primary benchmark 5490 K 1976 10.060m relative to TGZ also appears on the original diagram with a value of 10.058m