These are the meanings of the switches in the switch file,
as given in the ww3-v5.16 manual
F90 FORTRAN-90 style date and time capturing and program abort.
DIST Distributed memory model.
MPI Message Passing Interface (MPI).
LRB4 Use 4 byte words for record length in direct access files.
NOPA Compilation as a stand-alone program
PR3 Higher-order propagation schemes with Tolman (2002a) averaging technique.
UQ Third-order (UQ) propagation scheme.
FLX0 Flux computation included in source terms
LN1 Linear input: Cavaleri and Malanotte-Rizzoli with filter.
ST4 Input and dissipation: Ardhuin et al. (2010) source term package
STAB0
NL1 Nonlinear interactions: Discrete interaction approximation (DIA).
BT0 No bottom friction used.
IC0 No damping by sea ice.
IS0 No scattering by sea ice.
REF1 Enables reflection of(sic?) shorelines and icebergs
DB1 Depth-induced breaking: Battjes-Janssen.
TR0 No triad interactions used.
BS0 No bottom scattering used.
XX0 No supplemental source term used.
WNT1 Linear wind interpolation in time
WNX1 Approximately linear wind speed interpolation in space
CRT1 Linear current interpolation in time
CRX1 Approximately linear current speed interpolation in space
NOGRB No package included.
O0 Output of namelists in grid preprocessor.
O1 Output of boundary points in grid preprocessor.
O2 Output of the grid point status map in grid preprocessor.
NC4 Activates the NetCDF-4 API in the NetCDF pre- and post-processing programs.
RWND Correct wind speed for current velocity.