=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 05-MAY-94 :
UP TO 1993 (JULY) OTT GAUGE, SINCE 1993 (AUGUST) SONAR RESEARCH GAUGE
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2002Mar13 :
Zuluf data Dec. 1994-Dec. 1995 suspect (shows doubling in range) and deleted.

