How large is your flag radius when you own an island?

[Sig the Feared 0]

I own an island on a dedicated, I had someone drop a contesting flag near my base, from what I understand, if they drop it, but I'm near my flag, it won't tick for them?  Or do I have to go to their flag?

[Redrick 14]

Press H.

[Bacchusmirkwood 0]

It is a sphere with a radius of about 75 meters.