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Datums for 9459450, Sand Point AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9459450, Sand Point, AK
Status: Accepted (Sep 30 2011)
Units: Feet
Control Station:
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW7.24Mean Higher-High Water
MHW6.53Mean High Water
MTL3.93Mean Tide Level
MSL3.88Mean Sea Level
DTL3.62Mean Diurnal Tide Level
MLW1.34Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-30.51Station Datum
GT7.23Great Diurnal Range
MN5.19Mean Range of Tide
DHQ0.71Mean Diurnal High Water Inequality
DLQ1.33Mean Diurnal Low Water Inequality
HWI11.22Greenwich High Water Interval (in hours)
LWI4.94Greenwich Low Water Interval (in hours)
Max Tide11.59Highest Observed Tide
Max Tide Date & Time12/31/1986 22:30Highest Observed Tide Date & Time
Min Tide-3.81Lowest Observed Tide
Min Tide Date & Time12/13/2008 05:24Lowest Observed Tide Date & Time
HAT9.52Highest Astronomical Tide
HAT Date & Time12/31/1986 22:42HAT Date and Time
LAT-2.91Lowest Astronomical Tide
LAT Date & Time06/22/1986 17:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 9459450 Sand Point, AK

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