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Datums for 9466153, Helmick Point AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9466153, Helmick Point, AK
Status: Accepted (Apr 7 2011)
Units: Feet
Control Station:
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW10.18Mean Higher-High Water
MHW8.26Mean High Water
MTL4.45Mean Tide Level
MSL4.76Mean Sea Level
DTL5.09Mean Diurnal Tide Level
MLW0.64Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-20.22Station 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)
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
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