The tidal data is obtained from local primary control stations of the National Water Level Observation Network . A tide station is set up prior to acquiring soundings. More than one station may be set up depending on the project area. The equipment involved in an installation is extensive.
Dive gear is needed to establish the orifice.
A staff is installed for taking visual tidal observations. A tide gauge is used to collect data. Benchmarks and leveling equipment are used to establish elevations of the site. NOAA's Center for Operational Oceanographic Products and Services offers a detailed description of how and why a tide station is installed.