=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Esperanza           A  /001 RLR(1977) is 10.1m below Pilar de Referencia
=========================== BENCHMARK INFORMATION UPDATE ADDED  12-JUL-93 :
Esperanza           A  /001 RLR(1977) is 10.1m below Pilar de Referencia
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2001Mar21 :
Bahia Esperanza - acoustic gauge installed 1993.
February 1994 - December 1995 datum problems.
Became responsibility of NOS/NOAA in 1996.

