Apple Watch GPS Navigation + iPhone Navigation App idea

I am a professional drone Pilot. Presently I used Garmin as my primary GPS Navigation Device for searching crashed drones based on Precision GPS longitude and latitude oftenly in urban or rural area.

I honestly surprise what of apple device presently had somekind of navigation ??. but I mean it . u had A LOT OF THINGS TO DO.

if u'r gonna take this business this i thought this was a good Idea for you:

1. Apple watch and iPhone was a powerful tools in one brand, perfect compatibility, could be zero issues vs using other brand. and it should logically indeed !.
2. For Navigation using a apple Topographic Map in the future is a must for navigation purpose. and activated offline without telecommunication signal in rural area too
3. creating an Apple navigation app paired with Apple watch. drone pilot just enter "last position" of the crashed drone gps position, and we just follow the " short possible ways to go there to pick up.
4. water/weather resist.
5. people may get paid topo map or paid app like usual too

thanks

Ditto