English: The principal tidal data related to a beach profile. The intersection of the tidal datum with land determines the landward edge of a marine boundary.
page: The principal tidal datums related to a beach profile. The intersection of the tidal datum with land determines the landward edge of a marine boundary. From NOS Tidal Datums Pub (on Naval Postgraduate School). http://www.oc.nps.navy.mil/nom/day1/par