Datums for 9450642, Northern Carroll Inlet GPS Tide 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: 9450642, Northern Carroll Inlet GPS Tide Buoy, AK
Status: Accepted (Sep 29 2016)
Units: Feet
Control Station: 9450460 Ketchikan, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW15.57Mean Higher-High Water
MHW14.67Mean High Water
MTL8.13Mean Tide Level
MSL8.15Mean Sea Level
DTL7.79Mean Diurnal Tide Level
MLW1.60Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND20.15Station Datum
GT15.58Great Diurnal Range
MN13.07Mean Range of Tide
DHQ0.91Mean Diurnal High Water Inequality
DLQ1.60Mean Diurnal Low Water Inequality
HWI9.46Greenwich High Water Interval (in hours)
LWI3.14Greenwich 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
HAT19.75Highest Astronomical Tide
HAT Date & Time11/26/2034 21:24HAT Date and Time
LAT-4.43Lowest Astronomical Tide
LAT Date & Time05/27/2021 16:12LAT Date and Time
Tidal Datum Analysis Periods
05/15/2016 - 06/13/2016


Products available at 9450642 Northern Carroll Inlet GPS Tide Buoy, AK
  • Meteorological/Other
  • Meteorological Observations
  • Water Temp/Conductivity
  • PORTS®
  • This station is not a member of PORTS®