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Datums for 8724489, BIG COPPITT KEY FL


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8724489, BIG COPPITT KEY, FL
Status: Accepted (Aug 1 2003)
Units: Feet
Control Station: 8724580 Key West, FL
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.58Mean Higher-High Water
MHW1.28Mean High Water
MTL0.68Mean Tide Level
MSL0.55Mean Sea Level
DTL0.79Mean Diurnal Tide Level
MLW0.08Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.16North American Vertical Datum of 1988
STND-3.95Station Datum
GT1.58Great Diurnal Range
MN1.20Mean Range of Tide
DHQ0.30Mean Diurnal High Water Inequality
DLQ0.08Mean Diurnal Low Water Inequality
HWI7.12Greenwich High Water Interval (in hours)
LWI2.87Greenwich 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
04/01/1974 - 05/31/1974
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8724489 BIG COPPITT KEY, FL

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services