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Datums for 8735181, Dauphin Island Hydro AL


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8735181, Dauphin Island Hydro, AL
Status: Accepted (Feb 16 2006)
Units: Feet
Control Station: 8735180 Dauphin Island, AL
T.M.: 90
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.24Mean Higher-High Water
MHW1.22Mean High Water
MTL0.62Mean Tide Level
MSL0.59Mean Sea Level
DTL0.62Mean Diurnal Tide Level
MLW0.01Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-2.88Station Datum
GT1.24Great Diurnal Range
MN1.21Mean Range of Tide
DHQ0.02Mean Diurnal High Water Inequality
DLQ0.01Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT2.06Highest Astronomical Tide
HAT Date & Time10/18/1989 05:30HAT Date and Time
LAT-1.01Lowest Astronomical Tide
LAT Date & Time01/18/1988 14:54LAT Date and Time
Tidal Datum Analysis Periods
06/01/2005 - 11/30/2005
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8735181 Dauphin Island Hydro, AL

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services