=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-May-1994 1959-74 DATA RECEIVED FROM TOGA OFFICE =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Apr-1998 Following the receipt of TGBM information the RLR datum was redefined. Up to October 1967 recordings were made with gauging rods. In November 1967 a float gauge type HJC 1 was installed.