Sailor Steve said 16km is more realistic. I would have to go with Steve's assessment as I believe Sailor Steve is or was a sailor. Lets look at it this way. If you listen to the weatherman ofter they will state 'visability at....2 miles,' etc. On clear days the weatherman statement will say "visability at 10 miles or sometimes more. Seeing mast tips and tall columns of smoke very far away with binoculars is a very real thing. I believe the 8km mod was created for computers that have trouble generating the broader spectrum for field of view. I myself am lucky my rig can handle the 16km and I use it
