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Current Datum Value: 3.88

Datums for 8518643, Randalls Island NY


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8518643, Randalls Island, NY
Status: Accepted (Dec 4 2014)
Units: Feet
Control Station: 8518750 The Battery, NY
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW5.05Mean Higher-High Water
MHW4.74Mean High Water
MTL2.46Mean Tide Level
MSL2.50Mean Sea Level
DTL2.52Mean Diurnal Tide Level
MLW0.19Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.88Station Datum
GT5.04Great Diurnal Range
MN4.56Mean Range of Tide
DHQ0.31Mean Diurnal High Water Inequality
DLQ0.18Mean Diurnal Low Water Inequality
HWI2.75Greenwich High Water Interval (in hours)
LWI8.72Greenwich 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
HAT6.33Highest Astronomical Tide
HAT Date & Time10/16/1993 15:18HAT Date and Time
LAT-1.23Lowest Astronomical Tide
LAT Date & Time01/10/1997 22:06LAT Date and Time
Tidal Datum Analysis Periods
05/01/2014 - 07/31/2014




Products available at 8518643 Randalls Island, NY

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