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Datums for 9454561, Perch Point AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9454561, Perch Point, AK
Status: Accepted (Jun 19 2003)
Units: Feet
Control Station: 9454050 Cordova, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW11.72Mean Higher-High Water
MHW10.73Mean High Water
MTL6.08Mean Tide Level
MSL6.16Mean Sea Level
DTL5.86Mean Diurnal Tide Level
MLW1.43Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND3.63Station Datum
GT11.72Great Diurnal Range
MN9.30Mean Range of Tide
DHQ0.98Mean Diurnal High Water Inequality
DLQ1.42Mean Diurnal Low Water Inequality
HWI9.94Greenwich High Water Interval (in hours)
LWI3.66Greenwich 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
09/13/2000 - 10/26/2000




Products available at 9454561 Perch Point, AK

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