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Datums for 9461710, Atka AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9461710, Atka, AK
Status: Accepted (Aug 9 2017)
Units: Feet
Control Station: 9461380 Adak Island, AK
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.42Mean Higher-High Water
MHW3.20Mean High Water
MTL1.85Mean Tide Level
MSL1.97Mean Sea Level
DTL1.72Mean Diurnal Tide Level
MLW0.50Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.90North American Vertical Datum of 1988
STND-26.94Station Datum
GT3.41Great Diurnal Range
MN2.70Mean Range of Tide
DHQ0.22Mean Diurnal High Water Inequality
DLQ0.50Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide5.56Highest Observed Tide
Max Tide Date & Time01/18/2008 20:48Highest Observed Tide Date & Time
Min Tide-2.72Lowest Observed Tide
Min Tide Date & Time12/13/2008 09:12Lowest Observed Tide Date & Time
HAT4.89Highest Astronomical Tide
HAT Date & Time12/30/1990 23:00HAT Date and Time
LAT-1.84Lowest Astronomical Tide
LAT Date & Time06/22/1986 21:42LAT Date and Time
Tidal Datum Analysis Periods
03/01/2008 - 02/28/2009
12/01/2011 - 11/30/2014
05/01/2015 - 04/30/2016




Products available at 9461710 Atka, AK

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