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Datums for 8723933, GRASSY KEY, ATLANTIC SIDE FL


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8723933, GRASSY KEY, ATLANTIC SIDE, FL
Status: Accepted (Nov 4 2003)
Units: Feet
Control Station: 8723747 TAVERNIER HAWK CHANNEL
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW2.06Mean Higher-High Water
MHW1.87Mean High Water
MTL1.02Mean Tide Level
MSL1.06Mean Sea Level
DTL1.03Mean Diurnal Tide Level
MLW0.18Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.96North American Vertical Datum of 1988
STND-2.41Station Datum
GT2.06Great Diurnal Range
MN1.68Mean Range of Tide
DHQ0.20Mean Diurnal High Water Inequality
DLQ0.18Mean Diurnal Low Water Inequality
HWI1.89Greenwich High Water Interval (in hours)
LWI7.96Greenwich 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
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
06/01/1975 - 06/30/1975
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8723933 GRASSY KEY, ATLANTIC SIDE, FL

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