571_Ketchikan, AK_United States of America (the)
Datum	Value	Description
Status	14-Nov-2022	Processing Date
Epoch	01-Jan-1983 to 31-Dec-2001	Tidal Datum Analysis Period
MHHW	21.58	Mean Higher-High Water (ft)
MHW	20.67	Mean High Water (ft)
MTL	14.25	Mean Tide Level (ft)
MSL	14.25	Mean Sea Level (ft)
DTL	13.92	Mean Diurnal Tide Level (ft)
MLW	7.83	Mean Low Water (ft)
MLLW	6.27	Mean Lower-Low Water (ft)
STND	0.00	Station Datum (ft)
GT	15.31	Great Diurnal Range (ft)
MN	12.84	Mean Range of Tide (ft)
DHQ	0.91	Mean Diurnal High Water Inequality (ft)
DLQ	1.56	Mean Diurnal Low Water Inequality (ft)
HWI	Unavailable	Greenwich High Water Interval (in hours)
LWI	Unavailable	Greenwich Low Water Interval (in hours)
Maximum	27.20	Highest Observed Water Level (ft)
Max Date & Time	02-Dec-1967 22	Highest Observed Water Level Date and Hour (LST)
Minimum	1.03	Lowest Observed Water Level (ft)
Min Date & Time	14-Dec-2008 04	Lowest Observed Water Level Date and Hour (LST)
HAT	25.73	Highest Astronomical Tide (ft)
HAT Date & Time	05-Nov-1998 22	HAT Date and Hour (LST)
LAT	1.63	Lowest Astronomical Tide (ft)
LAT Date & Time	09-Aug-1983 16	LAT Date and Hour (LST)
LEV	Unavailable	Switch 1 (ft)
LEVB	Unavailable	Switch 2 (ft)