The Incident Wave Conditions section allows the user to specify wave conditions to be simulated in a run. Each condition is defined as a wave direction, period and amplitude. The wave direction is specified in degrees measured from the positive x-direction in a counter clockwise direction. This means that waves propagating from East to West have a direction of 0o, and waves propagating from South to North have a direction of 90o. The amplitude is specified in meters, and the period in seconds. These values are used as boundary conditions out to sea and are propagated to the open ocean boundaries on the domain using one-dimensional wave propagation. A set of values (one direction, frequency and period) can be selected by clicking in the window. The selected set can be via the edit boxes above the window. The buttons below the window can be used as follows: