How can you determine if a route is beyond VHF coverage?

[Beetle007]

Is there any Jeppesen chart symbol that tells you if a route or area is beyond VHF coverage (i.e., would require an HF radio).

 

[get2flyin]

Is there any Jeppesen chart symbol that tells you if a route or area is beyond VHF coverage (i.e., would require an HF radio).

Unlike my heroic brothers on the East, I just fly domestic. FWIW, when I can't hear the controllers anymore, I figure that's a good indicator that I've gone beyond VHF coverage. Hope that helps.

 

[McNugget]

Is there any Jeppesen chart symbol that tells you if a route or area is beyond VHF coverage (i.e., would require an HF radio).

It's in the legend section of the Jepp chart.

 

[FO 4 Life]

Is there any Jeppesen chart symbol that tells you if a route or area is beyond VHF coverage (i.e., would require an HF radio).

Whenever ACARS goes to NOCOMM.

Until the HF data link kicks in.

 

[noperf]

When the Captain wakes up because there's no "white noise" and asks if "we" missed a hand off.

 

[becket]

Is there any Jeppesen chart symbol that tells you if a route or area is beyond VHF coverage (i.e., would require an HF radio).

The symbol is "F.U." short for "frequency unavailable". That's when I pull out my sextant and start reporting my position with Morse Code via my on board Marconi.

 

[Skank]

Bet you didn't expect all these witty answers.

 

[CALRepublic]

Bet you didn't expect all these witty answers.

that's what I was thinking..... you're better off looking it up than asking here.

 

[dispatchguy]

Your flux capacitor will tell you

 

[Headfake14]

You are usually handed off prior to loosing VHF range. You'll get a primary HF and a back up freq. You can usually hear the VHF for awhile afterwards though. But, after the SELCAL checks good, I usually tune in 121.5 and 123.45 and enjoy the quiet.

As far as a specific chart, I haven't specifically looked. I will next time since my curiosity has been jabbed.

 

[de Pez]

In telecommunication, slant range is the line-of-sight distance between two points which are not at the same level relative to a specific datum.
An example of slant range is the distance to an airborne radar target, e.g., an aircraft flying at high altitude with respect to that of the radar antenna. The slant range is the hypotenuse of the triangle represented by the altitude of the aircraft and the distance between the radar antenna and the aircraft's ground track (the point on the earth at which it is directly overhead). In the absence of altitude information, the aircraft location would be plotted farther from the antenna than its actual ground track. An easy formula to calculate a slant range is: 1.225*square of altitude(in feet)=slant range.

Using this formula should allow you to calculate line of sight reception from any given transmission facility or antenna.

 

[Andy Neill]

An easy formula to calculate a slant range is: 1.225*square of altitude(in feet)=slant range.

Change the square to square root and I'll buy it. The square of 10,000 is 100,000,000 while the square root is 100.

 

[Amish RakeFight]

Oh...that's easy. When your tin hat begins to buzz more eradically than normal you're on the fringe of VHF coverage.

 

[de Pez]

Right, square root. I was looking for the square root symbol on my keyboard, but it seems to be missing.

 

[Andy Neill]

Right, square root. I was looking for the square root symbol on my keyboard, but it seems to be missing.

Try this:
X^0.5= square root of X.

 

[de Pez]

That was a joke.

 

[Headfake14]

time of day will have an effect of total range too with effects from the Ionosphere.

I was climbing out of PFN (panama city, fl) one early morning before sunrise...we were getting bleed over from some place in Oklahoma with the ctr freq we were on. We heard both parties...a/c and that atc controller. Wasn't clear as day, but good enough.

 

[getonit]

Those other guys have it all wrong, it is directly proportional to how much aluminum foil you have on your head at the time to prevent damage from solar radiation and alien technoligies.

 

[Headfake14]

Those other guys have it all wrong, it is directly proportional to how much aluminum foil you have on your head at the time to prevent damage from solar radiation and alien technoligies.

well....what I said, AND that of course. I thought that was understood

like mopeds and your friends seeing..ect

 

[Beetle007]

Thanks for the help. I finally found the VHF frequency GAP area symbol.