Despite the fact that some California all-weekend mobile T-hunts
require 300 or more miles of driving to find all the transmitters, Americans
still are not considered world-class RDF experts by the rest of the world's
hams. In most countries, cars and fuel are even more expensive than in the USA,
so they aren't used by the average ham for hobby purposes. Mobile transmitter
hunting is typically found only in the USA, Canada, England, Australia, Italy
and Japan. Everywhere else, it's entirely an on-foot sport, done for its
physical fitness benefits. In some eastern European countries, it has been an
important part of Physical Education programs in schools, for hams and non-hams
alike.
If you go to a former Soviet Union country, you probably won't hear many voices on the two-meter band. You can count the Russian cities with VHF ham repeaters on the fingers of one hand. But wherever you go in that part of the world, there is a good chance that you can hear the beeping transmissions of a two-meter foxhunt. The hunters are looking for five transmitters (called foxes) in a large area, usually woodlands. They have to run several kilometers to find them all. They carry maps and compasses and try to keep track of their location at all times, much like classic orienteering.
Compared to American-style mobile
T-hunts, an international-rules on-foot foxhunt is usually a much more
formal event. It takes preparation and on-site staffing to put on the
championships. On the other hand, radio-orienteering practice sessions can be
very informal. Setups for practice can be done by just one or two hams.
Uniform Rules for All Nations
Back in the 1970's, European on-foot
transmitter hunters discovered the fun of having national and international
contests. This required a standard set of rules, which were developed by a
committee of the International Amateur
Radio Union (IARU) and used for the first ARDF World Championships in 1980.
These rules have been modified over the years to add and revise the age/gender
categories, improve starting procedures, and so forth.
The detailed IARU document "Rules for Championships in Amateur Radio Direction Finding" is maintained by IARU's ARDF Working Group, comprising delegates from foxhunting countries around the world. It calls for five low-power (0.25 to 1.5 watt) foxes, automatically transmitting one after another (never at the same time) on the same frequency for exactly one minute each. Contestants attempt to locate as many as possible and get to the finish within the time limit, carrying a card to mark with the unique punches located at each fox. (Electronic registration/scoring systems are also allowed.) The start and finish may be at the same place, but usually they are at widely spaced points of the course. Both points are plainly marked on the map, a triangle for start and concentric circles for finish.
Contestants are individually timed. They start at intervals, usually every five minutes, coinciding with the start of fox #1 transmissions. This scatters the contestants on the course to minimize "follow the leader" problems. Winners are determined primarily by the number of transmitters found and secondarily by elapsed time.
Foxhunting is a map and compass exercise as well as a test of direction-finding skill. Successful hunters pay careful attention to their own location and the bearings to all foxes at all times, plotting them on detailed orienteering maps provided by the organizers. They know that if they miss a fox bearing, they must wait four minutes to hear that fox again. They also eye their watches, since exceeding the time limit (usually two to three hours) means disqualification. In other words, it is better to return under the limit with only one fox found than to find all five but take one minute over the limit. Each target transmitter has a distinctive identification, sent continuously in CW or MCW. Even without knowing Morse Code, it is easy to identify the individual foxes.
Under current IARU rules, all competitors use the same venue and search for
the same foxes, but there are nine age/gender categories. Only one category
(M21) is required to find all five. Others need to find only three or four
foxes; the designated ones are different for each category. Foxes may be found
in any order. Here are the categories and number of foxes to be found:
M19 - Males ages 19 and younger, 4
foxes Transmitters must be at least 400 meters apart, with a total optimum-route
course distance of 6 to 10 kilometers. Elevation change should not exceed 200
meters. The first fox should be at least 750 meters from the start. A prominent
red and white prism (orienteering flag) may be located close to each IARU fox
transmitter for visual identification. A homing fox at the finish line transmits
continuously on a separate frequency to aid competitors who get lost. Two meter
foxes in European and Asian IARU championships use AM with tone modulation, but
FM tones are often used in North America. There is also a separate contest on a
different day in all age/gender catetories on 80 meters, with keyed CW
transmitters. Gold, silver and bronze medals are awarded in each age/gender
category, individual and team, for both bands.
In about 30 countries where international-style foxhunting is popular, there
are local and wider area events, leading up to annual national championships.
Winners of these events are eligible to participate in multi-nation
championships. In even-numbered years, one nation hosts the World Championships.
Each country entering the World Championships may field one team of up to three
contestants in each category. Team members are not allowed to help one another;
Course Marshals are alert for violations. In odd-numbered years, IARU encourages
each of the three
regions to hold Regional Championships, hosted by countries in the
individual regions.
For local competitions and practice sessions, IARU's rules can be modified as
appropriate. For instance, no age categories are necessary if there are only a
few participants. Smaller venues, fewer fox transmitters, and different timing
may also be used.
Though done with completely different rules, international-style RDF
contesting is also frequently called foxhunting. Other names for this
on-foot sport are fox-teering, fox-tailing, radio-orienteering and
ARDF (for Amateur Radio Direction Finding).
Because it is both a mental and physical challenge, ARDF appeals to both
"techies" and "jocks" of all ages. It takes skill to get proper bearings, plot
them, set a course and navigate through the woods. It takes physical
conditioning to do it faster than your fellow competitors. Perhaps you or a
fellow club member have what it takes to become a champion. Your children and
grandchildren might, too. And what about your local Scout troop? Remember, a ham
license is not required to receive and track fox signals.
You don't have to be a combination of rocket scientist and marathoner to have
foxtailing fun. There is a lot of trotting, walking and pausing on the course,
plus a lot of head-scratching when the bearings don't to make sense. There is
also immense satisfaction for each person who completes the course, no matter
how long it takes. If ARDF activities have begun in your area, get involved. If
they have not started yet, get the ball rolling by talking to your club about it
and become a local ARDF Point of Contact. Send e-mail to the USA's ARDF Coordinator Joe Moell KØOV to get
on the PoC list. If you live in Canada, contact ARDF Coordinator Joe Young VE7BFK. If you are in
another country of North or South America besides USA and Canada, contact IARU Region 2 ARDF Coordinator Dale Hunt
WB6BYU.
The stateside development of ARDF has been surprisingly rapid. Before August
1999, only one formal multi-national foxhunt had ever been held on US soil. It
was put on by the Friendship Amateur Radio Society (FARS) of Portland, Oregon in
May 1991. FARS came into being as the result of a Sister Cities arrangement
between Portland and Khabarovsk, a similar-sized city in Asiatic Russia. Ham
operators of Khabarovsk invited a delegation of Portland hams to their homeland
in 1989 for a series of radiosporting events, including a European/Asian style
foxhunt. The experienced Russians won, of course. Everyone had so much fun that
it was decided to hold future Friendship Games every two years.
Portland hams reciprocated by putting on the second Friendship Radiosport
Games (FRG) in their city. Read Homing In for
September 1991 and "Showdown in Portland" in the November 1991 issue of 73
Amateur Radio Today Magazine for firsthand reports on FRG-91. Kevin Kelly
N6QAB won the individual foxhunt championship and the USA Red Team (KA7NOO,
KC7MZ, WB6JGV) from Washington won the team competition.
Victoria, BC Canada, another Khabarovsk sister city, hosted the next
Friendship Games gathering in 1993. By now, there were FARS chapters in USA,
Russia, Japan, and Canada. Read October 1993 Homing
In for all the details of FRG-93. The USA did not win this time.
The 1995 Friendship Games returned to Khabarovsk, with participants from all
four countries again in attendance. The story is in Homing In for December 1996.
Japan hosted the Games in 1997. Because the primary activity of Japan's host
club is foxhunting, the foxhunt was the main event. It was fully covered in
Homing In for January 1998.
The Friendship Games gave us good ARDF experience, but they were not
IARU-sanctioned events. In 1996, Kevin Kelly N6QAB was the first stateside ham
to participate in an IARU radio-orienteering contest when he traveled to the
Region 3 Championships in Townsville, Australia. He recounted his experiences in
the Homing In column for December 1996. The
photos above are from that event, courtesy of Kevin and his wife Susan.
Interest in radio-orienteering was rekindled among Californians in 1995.
Hamcon/Foxhunt-95 was staged at the ARRL Southwestern Division convention that
year. Then a formal foxhunt was a feature of the 1996 West Coast VHF/UHF
Conference. For details of Hamcon/Foxhunt-95 and the 1996 Conference hunt, read
Homing In for December 1995 and January 1996.
In fall 1997, a small group of hams across the USA and Canada formed the
North American ARDF Organizing Task Force to promote the sport. The American
Radio Relay League (ARRL) formally recognized this increasing interest at its
January 1998 meeting of the Board of Directors. ARRL's President was authorized
to appoint an ARDF Coordinator (Joe Moell KØOV) to work with hams here in the
USA and abroad to promote the sport and arrange for competitions.
E-mail and personal contacts between the ARDF Coordinator, the Task Force
members, and other ARDF enthusiasts around the world led to an invitation for
our presence at the 1998 IARU ARDF World Championships in Hungary. The call for
participation went out and six persons responded. After several informal local
foxhunting practice sessions and a formal training event in southern California,
they were ready for the big September event. All had a great time in Hungary.
They learned a great deal about techniques used by foxtailing winners and about
the organization of ARDF championship events. You can read all the details in
two feature articles: "The USA Takes on the World Foxhunting Championships." by
Joe Moell KØOV in the March 1999 issue of CQ VHF Magazine and "Amateur Radio
Direction Finding--The 1998 IARU World Championships" by Dale Hunt WB6BYU in the
May 1999 issue of QST Magazine. Homing In for
January 1999 also covered this event.
Later that month, the IARU Region 2 Plenary Conference in Venezuela approved
a request by FARS to include IARU Region 2 ARDF Championship foxhunts as part of
the 1999 Friendship Radiosport Games (FRG-99) in Portland, Oregon, staged during
the second week of August 1999. Dale Hunt WB6BYU, Team Leader for the Hungary
trip, agreed to be Foxhunt Chair for this event. In June 1999, Joe Moell KØOV
was appointed as the first IARU Region 2 ARDF Coordinator.
The first IARU Region
2 ARDF Championships in Portland brought hams from six European and Asian
countries to take on fifteen Team USA members and five Team Canada members
representing Region 2. In addition to the two-meter foxhunt, the first-ever
multi-nation 80-meter foxhunt in the Western Hemisphere took place there. V.I.P
attendees included Tom Atkins VE3CDM, IARU Region 2 President and Rik Strobbe
ON7YD, Interim Chair of IARU Region 1 ARDF Working Group. Homing In for October 1999 covered these historic
Championships in detail.
With the successful Portland event as impetus, year 2000 was much more active
for ARDF in the USA. Dozens of two-meter practice on-foot hunts took place from
California to North Carolina, and several places in between. Many of these
sessions helped prepare Team USA members for the 2000 ARDF World Championships
(WCs). The Team USA Qualifying Runs, held June 3-4 in southern California, had
the longest 2-meter and 80-meter ARDF courses in North America to date. Twelve
persons represented USA at the ARDF World Championships in
Nanjing, China during October 2000. They ranged in age from 15 to 59. Dale
Hunt WB6BYU became the first person from the Western Hemisphere ever to serve on
the International Jury at the ARDF WCs. Read more about the 2000 WCs in Homing In for January 2001.
Even more ARDF activity occurred in the USA during 2001, including the First USA ARDF
Championships in Albuquerque, New Mexico. Over 40 radio-orienteers from the
USA, Australia, China and Ukraine took to the courses. Homing In for February 2001 and ARRL's QST
Magazine for May 2001 had detailed pre-event articles. Follow-up Homing In articles were in the December 2001 and
January 2002 issues of 73 Magazine. Some USA ARDF enthusiasts also
participated in the Friendship Games foxhunt in Victoria, BC during the week
after the Albuquerque events.
Dale Hunt WB6BYU was appointed to be IARU Region 2 ARDF Coordinator in
October 2001, replacing Joe Moell KØOV who resigned to concentrate on stateside
ARDF development as USA ARDF Coordinator.
In April 2002, the Georgia Orienteering Club hosted the Second USA ARDF
Championships. Read all about it in Homing
In for July and August 2002. The Championships were also featured as
a cover article in Monitoring Times magazine for July 2002. Members of
Team USA 2002 were selected from the best performers at this event and at the
2001 Albuquerque hunts. These eleven Team USA competitors and one International
Jury member traveled to Slovakia during the first week of September for the 2002 ARDF World
Championships. USA's performance was the best ever, including one fourth
place and one fifth place in the individual standings. Homing In covered our WC participation in the
November and December 2002 installments.
The Third USA ARDF
Championships took place near Cincinnati, Ohio from July 30 through August
3, 2003, hosted by the OH-KY-IN Amateur Radio Club. It was also designated as
the Second IARU Region 2 ARDF Championships. Detailed coverage was in Homing In for Winter 2004, my first column after the
move to CQ VHF Magazine.
Santa Barbara Amateur Radio Club in California hosted the Fourth USA ARDF
Championships, June 16 - 19, 2004. Homing
In for Summer 2004 covered some unique aspects of these events,
including the first use of electronic scoring in our
national championships. This took place just in time for final selection of ARDF
Team USA 2004 members, who traveled to Brno in the Czech Republic for the 12th ARDF World
Championships in September. USA's team positions were filled based on
performances in the 2004 events in California and the 2003 events in Ohio. USA
also sent two persons to participate in the international jury at the World
Championships.
The Fifth USA ARDF
Championships and Third IARU Region 2 Championships returned to Albuquerque,
New Mexico during the first week of August, 2005, with participants from USA,
Australia, Kazakhstan and the Czech Republic.
The Sixth USA ARDF
Championships took place April 7 - 9, 2006 in Raleigh, North Carolina, after
which the members of ARDF Team USA 2006 were selected. In September, the team
traveled to Bulgaria for the 13th ARDF World
Championships, where Nadia Scharlau brought home USA's first World
Championships medal.
The Seventh USA
ARDF Championships and Fourth IARU Region 2 Championships will be September
14 - 16, 2007 near Lake Tahoe, which is on the California/Nevada border.
Keep checking this Homing In site for the
latest radio-orienteering news for the USA and all of North America.
The above references will increase your understanding of international style
ARDF and help you plan hunts in your area. For technical and equipment ARDF
references, see the Equipment Ideas for
Radio-Orienteering page at this site.
There are no individual members of IARU, only national Member-Societies such
as the American Radio Relay League (USA), Associazione Radioamatori Italiani
(Italy), and Federacion Mexicana de Radio Experimentadores (Mexico).
The IARU Constitution, last amended in 1989, organizes the Union into three
Regional Organizations that correspond to the three administrative regions of
the International Telecommunication Union (ITU). Each region has a Web site for
ARDF activities and an ARDF Coordinator (in parentheses), as follows:
IARU's headquarters (the International Secretariat) is located at the ARRL
building in Newington, Connecticut, USA. The current IARU President is Larry
Price W4RA. Presiding over Region 2 is Rod Stafford W6ROD.
Go to Equipment
Ideas for Radio-Orienteering -- Simple and inexpensive receiving and
transmitting solutions
Go to Latest
Championship Foxhunting News -- Stories of recent multi-nation ARDF events
and announcements of upcoming ones
Go to Electronic
Scoring for ARDF -- What it is, how it works, and why it's better than pin
punching
Go to Foxhunting for
Scouts -- Let's get the kids involved
Go to Try ARDF on 80
Meters. -- The "other" foxhunting band
Go to Extenders Aid
Handicapped Foxhunters -- A novel way to include persons with disabilities
This page updated 13 May 2007
M21 - Males of any age, 5
foxes
M40 - Males ages 40 and older, 4
foxes
M50 - Males ages 50 and older, 4
foxes
M60 - Males ages 60 and older, 3
foxes
D19 - Females ages 19 and younger, 4
foxes
D21 - Females of any age, 4
foxes
D35 - Females ages 35 and older, 4
foxes
D50 - Females ages 50 and older, 3 foxes
Using The Right Terms
In typical American mobile transmitter hunts, the competitors travel
most of the distance in their cars, with perhaps a short on-foot search (called
a sniff) at the end. In southern California and a few other places, these
events are called T-hunts and the device being searched for is the
hidden T. Elsewhere in the USA, they are called foxhunts, bunny hunts
or rabbit hunts.
The History of ARDF In North America

Radio-Orienteering Bibliography
Homing In columns on ARDF by Joe
Moell KØOV in 73 Magazine (1988-2003) and CQ VHF Magazine (Since
2004)
Other articles
Book
What Is The IARU?
The International Amateur Radio Union (IARU) is a federation of the
national Amateur Radio Societies of 146 countries around the world, working
together for the international good of Amateur Radio. IARU was formed in Paris,
France in 1925 and has become the watchdog and spokesman for the world Amateur
Radio community.
Go to Radio-Orienteering in
southern California -- Announcements of upcoming demonstration/practice
sessions and results of recent local events
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