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Datums for 9454671, POINT HELEN, KNIGHT ISLAND AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9454671, POINT HELEN, KNIGHT ISLAND, AK
Status: Accepted (Jun 2 2011)
Units: Feet
Control Station: 9454240 Valdez, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW11.64Mean Higher-High Water
MHW10.71Mean High Water
MTL6.11Mean Tide Level
MSL6.21Mean Sea Level
DTL5.82Mean Diurnal Tide Level
MLW1.50Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND0.89Station Datum
GT11.63Great Diurnal Range
MN9.21Mean Range of Tide
DHQ0.93Mean Diurnal High Water Inequality
DLQ1.50Mean Diurnal Low Water Inequality
HWI10.01Greenwich High Water Interval (in hours)
LWI3.69Greenwich 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
09/04/1996 - 10/21/1996




Products available at 9454671 POINT HELEN, KNIGHT ISLAND, AK

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