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Datums for 9466153, Helmick Point AK


Elevations on Station Datum

Station: 9466153, Helmick Point, AK
Status: Accepted (Apr 7 2011)
Units: Feet
T.M.: 135
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW30.40Mean Higher-High Water
MHW28.48Mean High Water
MTL24.67Mean Tide Level
MSL24.98Mean Sea Level
DTL25.31Mean Diurnal Tide Level
MLW20.86Mean Low Water
MLLW20.22Mean Lower-Low Water
NAVD88
STND0.00Station Datum
GT10.18Great Diurnal Range
MN7.61Mean Range of Tide
DHQ1.93Mean Diurnal High Water Inequality
DLQ0.65Mean Diurnal Low Water Inequality
HWI9.73Greenwich High Water Interval (in hours)
LWI4.54Greenwich 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
07/01/2010 - 08/31/2010




Products available at 9466153 Helmick Point, AK

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