6.23 miles
In much of the southern hemisphere the Big Dipper is not visible. It is only barely visible just above the horizon in the far north of Australia. The Southern Cross, or Crux, is a more useful aid to navigation.
There is no horizon in deep space.
I'm not certain that it matters just how tall you are, but at sea level I think the horizon is about 7 miles away.....
B Horizon
multiply the number of minutes that the aircraft is visible to you by 10 which gives you the amount of miles travelled.
You can't reach the horizon. No matter where you are or what you do the horizon will always be there in front of you. The distance between the shore and the horizon is infinite.
It Maybe B horizon or C horizon
At 100ft, the horizon is approx 12 miles away.
how far is the signal visible in miles
about 5-10 feet
As far as they want
It is visible, but not obviously as a planet. It is millions of miles away, and appears as a very bright star near the horizon, shortly before dawn or shortly after sunset. For some of the year, it is invisible because it appears too close to the Sun.