Last update: 1 August 2021
This page details the header tags supported by the Cabrillo Specification V3. The format for each line is <TAG>: followed by a space. The tags may be listed in any order in the log file.
Must be the first line of the log submission. The current version-number is 3.0.
Must be the last line of the log submission.
The callsign used during the contest.
String to identify the contest. Valid characters are A-Z, 0-9, and hyphen (-). Maximum length is 32 characters. Contest text values are not an official part of the specification. Contest sponsors may define their own contest values that are consistent with the above limitations. Some examples listed below for convenience.
Additional contest name examples can be seen here.
The category-assisted must be one of the following.
The category-band must be one of the following. If you are entering an all band category, use ALL, otherwise select one of the individual bands shown.
- VHF-3-BAND and VHF-FM-ONLY (ARRL VHF Contests only)
The category-mode must be one of the following.
The category-operator must be one of the following.
The category-power must be one of the following.
Type of station
The category-transmitter is required for multi-operator entries and must be one of the following.
CERTIFICATE: YES | NO
Indicate if you wish to receive, if eligible, a paper certificate sent via postal mail by the contest sponsor. The contest sponsor may or may not honor this tag, and if so may or may not use opt-in or opt-out as the default. YES is the default.
The claimed-score of the log submission, in integer form such as 1217315 or 19113 or 12. Do not include commas, decimals, or other text.
Name of the radio club to which the score should be applied.
Name and version of the logging program used to create the Cabrillo file.
Contact email address for the entrant. Must be valid email or blank.
Used to indicate the Maidenhead Grid Square where the station was operating from. E.g., FN42, JO44EB
Used to indicate the location where the station was operating from.
|ARRL/RAC Sections||For USA and Canada stations LOCATION must be the ARRL section abbreviation. For foreign stations LOCATION must be ‘DX’. This information is required for IARU-HF and for all ARRL and CQ contests.|
|IOTA Island Name||This information is required for RSGB-IOTA contest and includes Island Name (not IOTA reference number).|
|RDA Number||This information is required for RDXC contest.|
Name. Maximum of 75 characters long.
Mailing address. Each line should be a maximum of 45 characters long. Up to 6 address lines are permitted.
Optional fields for providing mailing address details.
OPERATORS: callsign1 [callsign2 callsign3…]
A space or comma-delimited list of operator callsign(s). You may also list the callsign of the host station by placing an “@” character in front of the callsign within the operator list, such as
OPERATORS: K1ABC N5XYZ @N6IJ
OPERATORS: K1ABC, N5XYZ, @N6IJ
The OPERATOR line is a maximum of 75 characters long and must begin with OPERATORS: followed by a space. Use multiple OPERATOR lines if needed.
OFFTIME: begin-time end-time
This tag is used to indicate off-time.
OFFTIME: 2002-03-22 0300 2002-03-22 0743 yyyy-mm-dd nnnn yyyy-mm-dd nnnn -----begin----- ------end------
Note: About on-time and off-time:
QSOs in Cabrillo are logged with a granularity of one minute. The use of one second granularity would lead to the question “during which exact second did the QSO take place?”
The ARRL has taken the very sensible interpretation that on-time and off-time also should be considered with a granularity of one minute. In other words, during any given minute you can either be on or off. Therefore 1801Z-1830Z would be a 30 minute off-time, with 1800Z being your last minute on before the break and 1831Z being the minute you resume operation.
If you make a QSO at 1800Z, take a break, and resume operating at 1830Z, then you have completed a 29 minute off-time.
Soapbox comments. Enter as many lines of soapbox text as you wish. Each line is a maximum of 75 characters long and must begin with SOAPBOX: followed by a space.
QSO data as specified by the Cabrillo QSO data format. All QSO lines must appear in chronological order. See QSO data specification.
Lines beginning with X- are ignored by the rlog checking software. Use this for adding comment lines to your log. Exception: See X-QSO.
The DEBUG: tag is intended for software developers. If an ARRL or CQ email robot receives a log with the DEBUG: tag set, then it will do all its regular processing and generate an auto-reply message, but it will not save the log into data set provided to the log checking team.