Wave height definition
You must also specify whether the wave heights in the data file are significant wave heights Hm0 or root-mean-square wave heights Hrms.
Origin of wave grid
The origin of the wave grid may not be coincident with the origin of the hydrodynamic grid, as long as it is coincident with one of the nodes of this grid. If this is the case, the position of the origin of the wave grid relative to the origin of the HD grid must be specified (in HD grid-point co-ordinates).
Wave period definition
You have to specify whether the wave period (as read from the data file or user-specified) is a mean wave period Tm or a peak wave period Tp.