backport of #3231 - SS WaveTp logic#3235

andrew-platt merged 2 commits intoOpenFAST:rc-4.2.1OpenFAST/openfast:rc-4.2.1from

andrew-platt:b/SeaState_WaveTp_logic_4.2.1_backportandrew-platt/openfast:b/SeaState_WaveTp_logic_4.2.1_backportCopy head branch name to clipboard