if ( Class->IsTurretEquipped ) {
    WeaponInfoStruct *W = Get_Primary_Weapon();
    if ( TechnoClass::Weapon_Valid(w) && !w->WeaponType->OmniFire ) {
        if ( w->__TurretLocked ) {//not sure what to do with, may be new in YR
            SecondaryFacing.Set_Desired(PrimaryFacing.Current());
        } else {
            SecondaryFacing.Set_Desired(dir);
        }
    }
}