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Datums for 9454564, SEAL ISLAND AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9454564, SEAL ISLAND, AK
Status: Accepted (Mar 25 2011)
Units: Feet
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW11.78Mean Higher-High Water
MHW10.88Mean High Water
MTL6.18Mean Tide Level
MSL6.30Mean Sea Level
DTL5.89Mean Diurnal Tide Level
MLW1.48Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND1.17Station 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)
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
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