What is the "Tactical" activity?

You can display two sets of GPS coordinates on the watch, similar to the tactix on DCR´s picture: 

That's it?

The screens for that are pace/timer, map, dual GPS coords, zone, etc.

Is "Tactical" just a generic activity tracker then? Hike, run, etc. but just shows coords as well?

Thanks.

So I guess this is what I'd choose when running my next Spartan race! 

thanks.

Does anybody know how to change the coordinate display? I'd like to see decimal degrees and grid coordinates but can currently only see decimal degrees and decimal degrees. 

This is especially great for some jobs in different branches that do similar things and talk to each other on the radio, but use different reference systems. I was Army and we used MGRS. However, we frequently talked to Air Force Pilots and Combat Controllers, who use the Decimal system. Rather than having somebody having some translation to do, it was nice to just be able to tell them where I was.

Can you explain how to display the different coordinate formats? 

I have the Fenix 5. I've opened the "tactical" activity activity it displays my coordinates, but in the same decimal format. I'd like to change one to read out MGRS

Menu->System/Format/Position Format