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Rules for both the Car hunts and the
ARDF hunts are posted on this page.
Car Hunt Rules
rules are for the Albuquerque Transmitter Hunters' traditional
car hunts, designed to keep this a fun event for all. Revised
May 4, 2010.
- The hidden
transmitter signal must be copyable at the starting point by agreement
among the hunters present. The start point is a small parking lot
at the north end of Yale between the UNM North Golf Course and the
Center for Non-Invasive Studies. Click
here for a map (opens new window). Start times are 1PM on the
first Sunday of each month and 9AM on third Saturday of
- The talk-in
frequency is the 146.90 (-, 67Hz PL) Albuquerque repeater, which is
almost always monitored by hunters before, during and after hunts.
- The primary
transmitter must be on 145.565 MHz and maintain constant power throughout
the hunt. The antenna may be in any configuration, but the polarization
must not change during the hunt. Secondary transmitters may be located
on a different frequency, which may be announced to hunters upon finding
the primary transmitter.
- The antenna
and transmitter shall be within 500 feet of access by standard passenger
cars in a publicly accessible area with no charge for admission. Reasonable
care must be taken to ensure that hunters can safely get to the hidden
transmitter and in the spirit of fun hunts, easy access to the transmitter
via a traffic or safety hazard should be avoided by the huntmaster.
- The winner of
the hunt is determined by the person/team who finds all transmitters
hidden with the lowest miles driven. Odometer readings are taken by
one of the hunters at the start point, and are then used to calculate
the mileage driven by each participant at the end of the hunt. The
winner becomes the next huntmaster.
- The hunt boundaries
are the edges of the latest Rand McNally map of Albuquerque, New Mexico.
However, Sandia Crest, military reservations, private property and
Native American reservation lands are out of bounds.
- Rule Modifications:
The following rule modifications must be announced at least a week
before a hunt if such a modification is deemed necessary by the huntmaster:
- Any boundary
extensions, which must be specified.
signals with less than 10 seconds of "on time."
- Any off-road
distance extensions, which must be specified.
- Any variations
to "minimum mileage wins" rule, which must be specified.
- Any change
of the primary transmitter frequency, which must be specified.
Because no official rules exist for IARU Region 2, The ARDF practice
sessions held by the Albuquerque Transmitter Hunters uses this
set of rules.
These rules are for use at ARDF practice sessions held by the Albuquerque
Transmitter Hunters and the Albuquerque Amateur Radio Club.
These rules are designed to support the development and growth of
the sport of ARDF in the US. Significant rule modifications
shall be communicated to participants before the event.
The course setter must have a valid ham radio license for the
band in use, All transmitters shall ID per FCC requirements. COMPETITORS
do not need a ham license as they are only receiving.
Competition is open to all (ham license not required for receiving,
Orienteers are welcome). However our land use permit ( old south
14 ARDF site) with the City of Albuquerque Open Space Division requires
us to get approval if the number of attendees exceeds 20. Please contact
us in advance if you plan to compete. No formal awards are given at
the practice sessions. Results shall be posted on this (or) the event
The age categories are as follows:
||19 and younger
||Regardless of age
||35/40 and older
||50 and older
||60 and older
Competitors belong to the M19 or D19 category up to the end of the
calendar year in which they reach the age of 19.
Men competitors aged 40 or older or women competitors aged 35 or
older belong to each category at the end of the calendar year of
A. For ARDF hunts held at NMO meets, the standard NMO meet fee schedule
is charged by the Orienteering club. This covers land use fees that
NMO has to pay for use of the venue, map printing and insurance provided
by USOF. A forest service parking fee is required at some NMO locations.
B. for hunts held on non NMO maps ( other sites) A fee may be charged
to cover the cost of publishing the map and control card. This is
normally less then $2 (depending on where we get the map printed).
RDF Championships shall take place on two amateur bands, namely
3.5 MHz and 144 MHz. Bands are alternated between each session.
I.E. one month its VHF and the next month its HF. The band is announced
in advance of the hunt via the abqardf list server. Additional sessions
nay be held during the month to allow a VHF followed by a HF hunt
to occur as we near a national champion ship date.
For national meets one meet day shall be a VHF race and one day
shall be a HF race. VHF and HF Days are announced in advance of
It is absolutely forbidden to give or take any assistance from or
to any person, including competitors, and also to utilize any means
or method of transport. The penalty for both shall be disqualification.
However competitors are expected to provide emergency assistance
or first aid to another competitor when needed: no competitor
will be disqualified for providing such assistance so long as they
gain no competitive advantage by doing so.
The use of GPS receivers for navigation is not allowed. It is
considered receiving assistance. No GPS devices are allowed on
the course (national or region II meets) by any competitor. Course
setters or event personal may use GPS devices.
Competitors shall not inflict loss or damage on or to the property
of any other person or the venue.
Competitors take part in all competitions at their own risk. All
Competitors will be required to sign a waiver form (NMO waver form
when hunts are held at NMO meets. Albuquerque transmitters hunters
waver form for all other AARC meets).
Each course will have at least 5 transmitters. Minimum distance
between transmitters is 400m, and the transmitter closest to the
starting point should be at least 750m away. Total course length
from start to finish, via all transmitters, should be between 4
and 7 km.
In the event of a thunderstorm, the course setter is entitled
to recall the competition immediately.
Each transmitter will be marked with a marker or flag within 2 meters.
Although the standard red and white triangular prism is recommended,
any unique, brightly colored marker is acceptable. All prisms must
be identical, and a sample must be displayed at the starting point.
The transmitter number shall be marked on the prism. The prism
must be at least 1 meter above the ground and visible from at least
10 meters away.
Transmitters must be operated within the regulations of the country
where the event is taking place. Frequencies shall be chosen in
accordance with the local band plan.
Antenna patterns will be omni directional in the horizontal plane.
Vertical polarization will be used on 80 meters. Horizontal polarization
will be used on 2 meters.
The standard MOE/MOI/MOS/MOH/MO5 sequence will be used. For US national
meets or region II meets a finish line beacon sending MO on a different
frequency shall be used for both the 80-meter and 2 meter hunts.
For local meets or practice meets the use of a finish line beacon
sending MO on a different frequency is optional.
(80 Meter band)
(2 meter band)
Frequencies may change as we near a national championship to the
ones used for the championships. Changes will be announced well
Homing Beacon (optional for local meets
and may not be used):
Power Level: Output power shall be between .02 - 5 Watts.
Modulation: CW (A1A) will be used.
Antenna: Vertical wire with radials
Homing Beacon (optional for local meets
and may not be used):
Power level: Output power shall be between 0.15
- 1 Watts.
Modulation: MCW AM Keyed carrier. .
Antenna: Omni directional horizontal (turn style)
Transmitters shall be searched by each category as follows.
- M21 category shall search all five transmitters
- M19 category shall not be scored for transmitter number 3 (MOS)
- M40 category shall not be scored for transmitter number 5 (MO5)
- M50 category shall not be scored for transmitter number 2 (MOI)
- D19 category shall not be scored for transmitter number 2 (MOI)
- D21 category shall not be scored for transmitter number 4 (MOH)
- D35 category shall not be scored for transmitter number 1 (MOE)
- D50 and M60 shall not be scored for transmitter number #4 (MOH)
and # 1 (MOE)
D. RULES FOR COMPETITORS
Each competitor shall provide her or his own equipment. However
some equipment may be available for loan. Please contact us in advance.
Requirement for official document giving date of birth removed form
rules since these are only practice sessions.
Competitors will be using sport ident E-sticks. The e-stick must
be registered (dibed) at each transmitter SI station, and downloaded
at the finish line. We have converted to the use of Sport Ident
an electronic orienteering punching system, paper tickets are being
used as a backup or if someone does not have an SI stick. Transmitters
may be found in any sequence.
The host society will establish procedures for starting order, start
corridors, waiting areas, control of equipment, etc., as appropriate.
The rules from other IARU regions serve as a model. The rules must
be easy to understand and follow for all participants.
Timeout: The maximum time allowed on the course shall be announced
before the start of the course, and will be at least 3 hours. Any
competitor exceeding this time shall be disqualified. The host organization
may also, at their discretion, modify the timeout period the day
of the event to take into account for any unexpected situations
such as weather. The timeout period may not be modified once the
event has started.