Re: heard on 40m yesterday at twilight CQ DX DE G2MT EMMA TOCK cq dx in the future

I have already told you. It's in the ITU Manual of International
Radio Callsigns. Approx 500 Euro from their HQ in Geneva.

73 de G3NYY


Blimey! Is that their equivalent to Beanie's £350 law book?

What you actually need to look up is Article 19 of the ITU Radio Regulations
"Identification of Stations". Particularly Section III, Formation of
Callsigns. Para 19.67 for Amateur Callsigns.

73
Jeff

Section III ? Formation of call signs

19.45 § 21 1) The twenty-six letters of the alphabet, as well as
digits in the cases specified below, may be used to form call signs.
Accented letters are excluded.

19.46 2) However, the following combinations shall not be
used as call signs:

19.47 a) combinations which might be confused with distress
signals or with other signals of a similar nature;

19.48 b) combinations in Recommendation ITU-R M.1172 that are
reserved for the abbreviations to be used in the radiocommunication
services.

19.49 SUP

19.50 § 22 Call signs in the international series are formed as indicated
in Nos. 19.51 to 19.71. The first two characters shall be two letters or a
letter followed by a digit or a digit followed by a letter. The first two
characters or in certain cases the first character of a call sign constitute
the nationality identification.

19.50.1 For call sign series beginning with B, F, G, I, K, M, N, R, W and 2,
only the first character is required for nationality identification. In the
cases of half series (i.e. when the first two characters are allocated to
more than one Member State), the first three characters are required for
nationality identification. (WRC-03)

19.51 Land and fixed stations

19.52 § 23 1)

? two characters and one letter, or

? two characters and one letter followed by not more than three
digits (other than the digits 0 and 1 in cases where they immediately follow
a letter).

19.53 2) However, it is recommended that, as far as possible, the
call signs of fixed stations consist of:

? two characters and one letter followed by two digits (other than
the digits 0 and 1 in cases where they immediately follow a letter).

19.54 Ship stations

19.55 § 24 1)

? two characters and two letters, or

? two characters, two letters and one digit (other
than the digits 0 or 1).

19.56 2) However, ship stations employing only radiotelephony may
also use a call sign consisting of:

? two characters (provided that the second is a letter) followed
by four digits (other than the digits 0 or 1 in cases where they immediately
follow a letter), or

? two characters and one letter followed by four digits (other
than the digits 0 or 1 in cases where they immediately follow a letter).

19.57 Aircraft stations

19.58 § 25

? two characters and three letters.

19.59 Ship?s survival craft stations

19.60 § 26

? the call sign of the parent ship followed by two digits (other
than the digits 0 or 1 in cases where they immediately follow a letter).

19.61 Emergency position-indicating radiobeacon stations

19.62 § 27

? the Morse letter B and/or the call sign of the parent ship to
which the radiobeacon belongs.

19.63 Aircraft survival craft stations

19.64 § 28

? the complete call sign of the parent aircraft (see No. 19.58),
followed by a single digit other than 0 or 1.

19.65 Land mobile stations

19.66 § 29

? two characters (provided that the second is a letter) followed
by four digits (other than the digits 0 or 1 in cases where they immediately
follow a letter), or

? two characters and one or two letters followed by four digits
(other than the digits 0 or 1 in cases where they immediately follow a
letter).

19.67 Amateur and experimental stations

19.68 § 30 1)

? one character (provided that it is the letter B, F, G, I, K, M,
N, R or W) and a single digit (other than 0 or 1), followed by a group of
not more than four characters, the last of which shall be a letter, or

? two characters and a single digit (other than 0 or 1), followed
by a group of not more than four characters, the last of which shall be a
letter. (WRC-03)

19.68A 1A) On special occasions, for temporary use, administrations
may authorize use of call signs with more than the four characters referred
to in No. 19.68. (WRC-03

19.69 2) However, the prohibition of the use of the digits 0
and 1 does not apply to amateur stations.

19.70 Stations in the space service

19.71 § 31 When call signs for stations in the space service are employed,
it is recommended that they consist of:

? two characters followed by two or three digits (other than the
digits 0 and 1 in cases where they immediately follow a letter).


.

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