A line on a map connecting points at which a tidal level, especially high tide, occurs simultaneously.
（地图上的）同潮线
Example sentencesExamples
Instead, as is shown on the map, most co-tidal lines lie at a marked angle to the longitudes and some are even perpendicular to them.
When the co-tidal line of high water (the wave crest) is situated at one side of the amphidromic point, the co-tidal line of low water (the wave trough) is situated at the other side.
Co-tidal lines run in the southwest direction in the southern coast of Korea.
While developing his theory on the wave characteristics of light, he showed how the propagation of tidal waves could be represented on charts as a series of co-tidal lines.
Apply oceanographic principles for the development of co-tidal lines and tidal zoning.