FENCE_RADIUS - how used?

I can’t seem to figure out what this command does. My only use case (for Rover) would use if the minimum was much lower, say 2 meters.

Can someone help me understand the application?

FENCE_RADIUS: Circular Fence Radius

Circle fence radius which when breached will cause an RTL

Range Units
30 to 10000 meters

This parameter controls (assuming you have the correct FENCE_TYPE enables) how far from the home position your vehicle can go before breaching. Imagine a 30m (for example) radius around your home position (where you arm) that acts as a virtual “fence”.

Leave it disabled. Unless you have a very robust obstacle avoidance configuration, when RTL is triggered, it will make a beeline for the home waypoint, up to and including through your house and any tree, bush, fence, pond, or pool in between.

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