Nautical Term: TTL
Definition of TTL
True Total Tide (TTL) refers to the summation of all tidal components contributing to the overall tide at a given location. In navigational charts, TTL values are often shown to help mariners estimate tide heights and currents during their voyages. For instance, suppose a sailor intends to dock at a marina in Portland, Oregon. The navigational chart shows that the TTL value for Portland harbor is 11 feet. With this information, the sailor can estimate the tide height when they arrive at the marina and plan their docking accordingly.
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