FL Wun Hundred / Heading XXX Degrees
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FL Wun Hundred / Heading XXX Degrees
Would anyone kindly point me in the right direction reference the above phraseology?
We are supposed to use the term "degrees" after a heading and refer to FL's in hudreds (100,200 etc.) and in single digits otherwise(240) . . . am I right?
Thanks in advance!
We are supposed to use the term "degrees" after a heading and refer to FL's in hudreds (100,200 etc.) and in single digits otherwise(240) . . . am I right?
Thanks in advance!
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'Degrees' after a heading is only necessary if the heading ends in a zero, otherwise spot on 
From MATS Pt 1
From MATS Pt 1
3.4.2 When transmitting messages containing aircraft callsigns, flight levels, headings, wind direction and speed, pressure settings, frequencies, transponder codes, and aircraft speeds, each digit shall be transmitted separately. The only exceptions to this are FL100, 200, 300 etc. which will be transmitted as “Flight Level (number) Hundred”
5.1.3 For all transmissions, with the exception of those used for surveillance or precision radar approaches, “degrees” shall be appended to heading figures where the heading ends in zero, or in cases where confusion or ambiguity may result.
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If i understand correctly.....
Headings ending in zero must have the word degrees after them; headings ending in any other number it is optional but not required. This is to avoid confusion between degrees and flight levels when issuing combined instructions or when cockpit workload is high and there could be confusion as to whether the number just given was a heading or a level.
FL100, 200 and so on - the word hundred is used to emphasise the two zeros, as it is easy otherwise to hear "one one zero" or "two two zero" instead of "one zero zero" and so on.
Just a trainee, so if anyone wants to correct me, feel free, but thats how I understand it.
FL100, 200 and so on - the word hundred is used to emphasise the two zeros, as it is easy otherwise to hear "one one zero" or "two two zero" instead of "one zero zero" and so on.
Just a trainee, so if anyone wants to correct me, feel free, but thats how I understand it.
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Found this thread whilst swotting for my PPL R/T exam.
CAP 413 says "Flight level (number) hundred". My Trevor Thom book says "Flight level one hundred", but other hundreds must be digit-by-digit ("Flight level two zero zero").
I presume my Thom book (2005 edition) is out of date in this respect, but I'd be interested to know if current PPL exam papers are similarly out of date.
CAP 413 says "Flight level (number) hundred". My Trevor Thom book says "Flight level one hundred", but other hundreds must be digit-by-digit ("Flight level two zero zero").
I presume my Thom book (2005 edition) is out of date in this respect, but I'd be interested to know if current PPL exam papers are similarly out of date.
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I see to remember from the dim and distant past (the FL wun hundred thing is NOT worldwide, nor is heading 280 degrees) that initially it was only FL100 that was to spoken as wun hundred, with FL200 being two zero zero. This may account for the discrepancy noted by GB.
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Down here in Spain:
- Flight level one (two, three) zero zero.
- Heading two four zero. We do not use the word "degrees" after a heading, neither ending in 0 nor 5 (only if i want you to turn XX "degrees", but this has been discussed previously in other threads).
- Flight level one (two, three) zero zero.
- Heading two four zero. We do not use the word "degrees" after a heading, neither ending in 0 nor 5 (only if i want you to turn XX "degrees", but this has been discussed previously in other threads).
Last edited by belk78; 13th Oct 2008 at 16:06.
Parochialism rules again - the above requirements re FL ... hundred and degrees apply in the UK, where, naturally, we think we know better than the rest of the world. I believe that the use of "hundred" for FLs has been proposed to ICAO - perhaps someone else knows more about this.
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Both justanothertatc and Graham Borland are correct.
Originally, FL Wun Hundred was brought in to overcome the confusion between FL110 (Flight Level wun wun zero) and FL100 (Flight Level wun zero zero).
Both of these levels are commonly used in busy TMA/high cockpit-workload environments.
I believe, (but stand to be corrected), that the 'hundred' bit was subsequently extended to the two higher levels also.
PPLs up at FL100?? - ZOOT ALLORS!!
Originally, FL Wun Hundred was brought in to overcome the confusion between FL110 (Flight Level wun wun zero) and FL100 (Flight Level wun zero zero).
Both of these levels are commonly used in busy TMA/high cockpit-workload environments.
I believe, (but stand to be corrected), that the 'hundred' bit was subsequently extended to the two higher levels also.
PPLs up at FL100?? - ZOOT ALLORS!!
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agreeing with the previous trainee, but in a different english-speaking windswept nor'western european island: one can group altitude, visibility, cloud cover and rvr. everything else single digit at a time, according to the easily confused folk at icao.
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To a couple of erroneous posters below, "Flight Levels" begin at 180 in the US. Everything below that is thousands or thousands/hundreds.
Maybe if you set those transition levels a bit a higher instead of trying to collect control fees this question would go away.
And yep, plenty of PPL's above 10 thousand, though a bit rarer at the flight levels.
Maybe if you set those transition levels a bit a higher instead of trying to collect control fees this question would go away.
And yep, plenty of PPL's above 10 thousand, though a bit rarer at the flight levels.
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tbavprof - I seriously doubt the setting of transition altitudes has anything to do with fee collection. The point of having 3,000 ft as the general transition alt in the UK (there are TMAs with different TAs) is that away from some areas of the Scottish highlands and a bit of Wales, there is no terrain hazard above that alt, thus at FL35 everyone is at least on the same altimeter setting. Altitudes should be used where terrain separation is an issue, but FLs are more appropriate when well above terrain and the issue is solely one of aircraft separation.
And to correct your erroneous post, flight levels in USA begin at the lowest available FL at least 1,000 ft above an altitude of 17,000 ft.
And to correct your erroneous post, flight levels in USA begin at the lowest available FL at least 1,000 ft above an altitude of 17,000 ft.
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Have Scooby Snack
And to correct your erroneous post, flight levels in USA begin at the lowest available FL at least 1,000 ft above an altitude of 17,000 ft.
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