After constructing both components of the hydrostatic pressure gradients, the remaining terms on the right hand side of the momentum equations are computed first for the zonal component of momentum given by Equation (4.1) and then for the meridional component of momentum given by Equation (4.2). This is accomplished by a ``do n=1,2'' loop extending to Section 22.9.9. All workspace arrays used in the momentum operators are re-computed for each component of momentum. Therefore all momentum operators can only be used from within this nloop which implies all diagnostics using these operators are issued from within this n loop.