=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 13-Jan-1998
National Tidal Facility SEAFRAME station
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 26-Aug-2010
Supplying authority have confirmed that tide gauge zero is chart datum (1990). Tide gauge benchmark TON 1 is 2.0686 m above chart datum. RLR is defined as 8.0 m below TON 1