PacePro navigation for event

Hi all,

I want to try out the PacePro feature for an upcoming running event.

I downloaded the gpx course and added my PacePro strategy and sent it to my watch.

When I want to start my PacePro plan I get asked whether I want to use navigation or not. Here I am unsure what to select.

For an official event where the course is clearly marked I dont need a navigation, right ? The only use for navigation is to make sure you are still on the correct track, nothing else.

Or is there any additional benefit of the navigation? 

Regards

Volker