FWIW none of these things are actual commercial flight regulations. In particular, it&#x27;s quite possible (though I&#x27;m guessing uncommon) to get a commercial license without an IFR, and it&#x27;s definitely very common to run single-engine, single-pilot operations with plain vanilla instruments (avionics).<p>I&#x27;m not familiar with air transport regulations, however, and some of these things may apply there.