=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-MAY-94 :
1959-74 DATA RECEIVED FROM TOGA OFFICE
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-APR-98 :
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.

