The problem here is that there is NO presently established method to use electronic measurement to lay out cal courses. There are two levels of instrumentation. There is highly-accurate laser equipment, costly and used by surveyors. If asked, a surveyor will be able to produce a certificate attesting to the proper calibration of the individual instrument.
There is also an emerging market in consumer-grade electronic measuring equipment. Its accuracy is unknown to me and, I suspect, to most certifiers. The certifiers must understand the methodology in order to sign the USATF Certificate of Accuracy.
It’s not enough to go out and buy a magic electronic measuring device , use it, and believe that the label on the instrument is proof of accuracy. Without confidence in accuracy, certification is a sham.
Steel tapes have been around for a long time, and experience has shown that they are accurate enough for our purposes.
If you want to use electronic measurement, hire a Registered Professional Surveyor to do the job. He has the proper calibrated equipment and knows how to use it. Of course, he may elect to use a steel tape! It’s hard to shave much time off what is, after all, a half-hour procedure.