=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-JUL-93 :
Many stations on the Gulf coast have large values for September 1961.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
St Marks            940/047 RLR(1967) is 8.1m below BM6
=========================== BENCHMARK INFORMATION UPDATE ADDED  12-JUL-93 :
St Marks            940/047 RLR(1967) is 8.1m below BM6
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 09-Feb-2012 :   
St. Marks is now an Historic Station. Last data received was that for 1975.
Although there are entries for both St. Marks Lighthouse and St. Marks City and
the latter does list an earlier benchmark 6 the reference to this and the TGZ
does not tally with the value from the original RLR diagram.

