National Ocean Service (Continued) 
Kinds of Data 
Tide Observation Station Lists 
Tides, 6-min Heights 
Tides, Hourly Heights 
Tides, Times and Heights of High and Low Waters 
Tides, Monthly Mean Summaries 
Tidal Bench Mark Sheets with Tidal Datums 
Frequency and Duration Analysis of Tidal Water Levels 
Tidal Zoning (Area Prediction Factors) 
Special Services 
Location: Coastal states and territories of the United 
States 
Description of Data: Tidal Observation Station Lists provide information by 
state of the tide stations maintained by the National Ocean Service (NOS) for 
the United States and its territories. Each list includes the station number, 
name, latitude, longitude, dates of observation, bench mark sheet publication 
date, and tidal epoch. Other station information is available upon request. 
Specialized tide observation station lists include the National Tide Obser- 
vation Network (NTON), composed of a list of all NOS long-term operating tide 
stations; and the Marine Boundary tide stations list, which provides tide 
stations in states with cooperative/NOS marine boundary programs. The states 
included are New Jersey, South Carolina, Florida, Mississippi, Louisiana, and 
California. 
Tides, 6-min Heights, are the compilations of the recorded height in 
hundredths of feet of the water level for every 6 min of each day at tide 
observation stations. Tidal 6-min heights first became available in the mid- 
1960s. Data for stations maintained in the NTON after this date are available 
on digital magnetic tape. Data for a substantial number of stations not in 
the NTON are also available on digital magnetic tape. 
Tides, Hourly Heights, are the records of the height of the water level 
(in feet) on the hour for each hour of each day at tide observation stations. 
All heights are referenced to a datum. The records for stations in the NTON 
are available on either hard copy or on digital magnetic tape. Records for a 
substantial number of stations not in the NTON are also available on either 
hard copy or on digital magnetic tape. A large number of stations installed 
for a short period are not digitized, but data are available in hand-tabulated 
form. 
Tides, Times and Heights of High and Low Waters, are the records of the 
time and heights (in feet) of the high and low waters for each day at tide 
observation stations. All heights are referenced to a datum. The records for 
stations in the NTON are available on either hard copy or on digital magnetic 
tape. A large number of stations installed for a short period are not digi- 
tized, but data are available in hand-tabulated form. 
III-5 
