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Datums for 9451438, Entrance Island AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9451438, Entrance Island, AK
Status: Accepted (Aug 16 2006)
Units: Feet
Control Station: 9450460 Ketchikan, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW14.56Mean Higher-High Water
MHW13.70Mean High Water
MTL7.62Mean Tide Level
MSL7.65Mean Sea Level
DTL7.28Mean Diurnal Tide Level
MLW1.54Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND3.35Station Datum
GT14.56Great Diurnal Range
MN12.16Mean Range of Tide
DHQ0.86Mean Diurnal High Water Inequality
DLQ1.54Mean Diurnal Low Water Inequality
HWI9.71Greenwich High Water Interval (in hours)
LWI3.44Greenwich 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
HAT17.84Highest Astronomical Tide
HAT Date & Time11/13/1985 21:54HAT Date and Time
LAT-3.95Lowest Astronomical Tide
LAT Date & Time12/24/1999 04:36LAT Date and Time
Tidal Datum Analysis Periods
05/01/2006 - 05/31/2006




Products available at 9451438 Entrance Island, AK

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