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Datums for 9454564, SEAL ISLAND AK


Elevations on Station Datum

Station: 9454564, SEAL ISLAND, AK
Status: Accepted (Mar 25 2011)
Units: Feet
T.M.: 135
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW10.61Mean Higher-High Water
MHW9.71Mean High Water
MTL5.01Mean Tide Level
MSL5.13Mean Sea Level
DTL4.72Mean Diurnal Tide Level
MLW0.31Mean Low Water
MLLW-1.17Mean Lower-Low Water
NAVD88
STND0.00Station Datum
GT11.79Great Diurnal Range
MN9.40Mean Range of Tide
DHQ0.91Mean Diurnal High Water Inequality
DLQ1.49Mean Diurnal Low Water Inequality
HWI10.05Greenwich High Water Interval (in hours)
LWI3.75Greenwich Low Water Interval (in hours)
MaximumHighest Observed Water Level
Max Date & Time Highest Observed Water Level Date and Time
MinimumLowest Observed Water Level
Min Date & Time Lowest Observed Water Level Date and 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
09/01/1998 - 09/30/1998




Products available at 9454564 SEAL ISLAND, AK

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