Datums for 9451454, Security Bay GPS Buoy AK

Data Quality Data from this station was collected using methodology that does not meet CO-OPS highest level of accuracy (no more than 10 cm, 95% Confidence Interval (CI) referenced to a tidal datum). Recognizing that lower quality data can be used for certain applications CO-OPS is making this data available to its users with restraint. The average six-minute water level observations derived from this system have an accuracy ranging from 10.0 - 30.0 cm, 95% CI on datum. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9451454, Security Bay GPS Buoy, AK
Status: Accepted (Jul 19 2016)
Units: Feet
Control Station: 9451054 Port Alexander
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW13.08Mean Higher-High Water
MHW12.27Mean High Water
MTL6.87Mean Tide Level
MSL6.87Mean Sea Level
DTL6.54Mean Diurnal Tide Level
MLW1.47Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND3.85Station Datum
GT13.07Great Diurnal Range
MN10.80Mean Range of Tide
DHQ0.81Mean Diurnal High Water Inequality
DLQ1.46Mean Diurnal Low Water Inequality
HWI9.66Greenwich High Water Interval (in hours)
LWI3.37Greenwich 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
02/01/2015 - 02/28/2015


Products available at 9451454 Security Bay GPS Buoy, AK
  • Meteorological/Other
  • Meteorological Observations
  • Water Temp/Conductivity
  • PORTS®
  • This station is not a member of PORTS®