Q: How does MOSES chose the phases doing a time domain simulation?
REV 7.00

A: If the sea was defined as a regular wave, then the phase is zero. If, however, the sea was specified via a spectrum another method is used. Here, the phases are chosen as

          phi(i) = -t_r / w(i)

Here, phi(i) is the phase for the ith component, w(i) is the frequency of the ith component, and t_r is a time. By using this scheme, you always get the same sea, and two time domain simulations will yield identical results. The time, t_r, has an interesting interpretation - it is a time at which all of the components reinforce, i.e. at this time the amplitude of the sea is the sum of all of the Fourier coefficients. Depending on the number of components you use, this sum is "unreasonably" large and this time is to be avoided during the simulation. Thus the default is set to be a large number. If you need to change it to perform Monte Carlo simulations, you can do so with:

         &DEFAULT -T_REINF T_R