Dual scale bar - please add nautical miles option

[geodoozer]

I am a GIS Analyst and variously map coastal areas to inform visitors to both terrestrial parks and neighboring marine reserves.  Tourists tend to understand kilometers, whereas serious boaties know nautical miles.

I am delighted dual scale bars was added at v3.5 (thanks heaps!).  This saves a lot of "finessing" time. 

May I ask for an additional refinement in future?  Could nautical miles be added as a drop-down option please?

Thank you very much for your consideration.

[DanPatterson]

This has appeared before regarding project units, but obviously not closed/implemented

Add nautical miles as a default to project Units >... - Esri Community

the comments there may be of use in the interim