カテゴリー
 本大会では、次のようにカテゴリーとエントリー人数を設定します。

 Female  Male   Age
 W15  M15  2000年1月1日以降に生まれた女性また は男性
 W19  M19  1996年1月1日以降に生まれた女性または 男性
 W21  M21 年齢不問
 W35   1980年12月31日までに生ま れた女性
   M40 1975年12月31日までに生まれた男性
 W50  M50 1965年12月31日までに生まれた女性 もしくは男性
 W60  M60 1955年12月31日までに生まれた女性 もしくは男性
   M70 1945年12月31日までに生まれた男性
 
それぞれの団体は、4つの競技を通じてそれぞれのカテゴリーに3名以内の選手から なる
1チームのみエントリーすることができます。
但し、W15/M15およびW19/M19は2チームをエン トリーすることができます。
 
 
Rules for the ARDF Sprint Competition
S1. General provisions
S1.1 The sprint event shall be organised in a forest or city park easily accessible by the public.
S2. Starting order
S2.1 The competitors within one category start at equal start intervals. Minimum start interval is 2 minutes.
S2.2 Competitors from the same society and category may not start consecutively.
S2.3 Competitors from the same category may not start at the same time in the sprint competition.
S3 Race system
S3.1 The competition shall be run as two loops with a spectator run through the finish area between them.
S3.2 Each competitor runs through the start corridor, which leads to the area with transmitters No.1 to No.5 (slow
keying). After finding all the required transmitters from this loop, he/she runs to the spectator control and through
the spectator corridor to the area with transmitters No.1F to No.5F (fast keying). After finding all the required
transmitters from this loop, the competitor runs to the finish beacon and through the finishing corridor to the finish
line.
S3.3 The transmitters searched for on each of the loops are defined in advance but may be visited in any order. All
transmitters searched for on each loop shall be on the same frequency.
S3.4 The finish beacon and the spectator control may be at the same place. In this case, there is no spectator control
transmitter.
S4. Courses
S4.1 The transmitters shall be located not less than 100 metres apart and not less than 100 metres from the start.
S4.2 The beacon (B) and the spectator control (S), if this differs from the beacon, could be located less than 100
metres from the start.
S4.3 The course shall be planned for an expected winning time of 15 minutes in all categories.
S5. Maps
S5.1 The map for the sprint event shall be made at the scale 1:5000 or 1:4000, and shall not be more than 2 years old.
S5.2 The competitor receives the map along with the receiver in the pre-start area 2 minutes before the start. The start,
finish beacon, spectator control, if this differs from the beacon, finish corridor and finish line shall be clearly
marked on the map. The start is marked by a triangle (symbol 701), the finish beacon and spectator control by a
circle (symbol 702), the finish corridor by a dashed line (symbol 705) and the finish by two concentric circles
(symbol 706).
S5.3 The organisation of the finish area shall be explained to the competitors in advance along with the symbols on the
map.
S6. Transmitters
S6.1 Transmitters with a lower output power (0.3…1W) shall be used in the sprint competitions.
S6.2 The beacon (B) and the spectator control (S), if this differs from the beacon, shall operate continuously on the
frequencies different from the other transmitters and from each other.
S6.3 Two sets of five transmitters shall be used in the sprint event. Transmitters groups 1 to 5 and 1F to 5F shall
operate on different frequencies and with different keying speeds.
Example of frequency and keying speed assignment:
frequency function code speed
3510 kHz TX 1…5 MOE…MO5 50 PARIS
3540 kHz spectator control S 70 PARIS
3570 kHz TX 1F (fast)…5F MOE…MO5 70 PARIS
3600 kHz finish beacon MO 50 PARIS
ARDF RULES — Part B / 2015 — valid from January 1st, 2015 Pg 19
S6.4 Transmitters operate in the following sequence:
No. 1 and 1F sending code MOE in seconds 0 to12
No. 2 and 2F sending code MOI in seconds 12 to 24
No. 3 and 3F sending code MOS in seconds 24 to 36
No. 4 and 4F sending code MOH in seconds 36 to 48
No. 5 and 5F sending code MO5 in seconds 48 to 60
– of a 1-minute cycle starting at 0:00
S6.5 Transmitters are equipped with registering devices without flags. The finish beacon is equipped with at least two
registering devices, especially if acting as the spectator control as well. Field transmitters have no flags and their
registration devices stands are painted in red and white stripes. The spectator control and the beacon are
equipped with flag.
S6.6 The beacon (B) and the spectator control (S), if this differs from the beacon, are registered as any other
transmitter.
S6.7 The number of transmitters assigned to each age category will normally be twice the number given in 20.7.
S7. Corridors
S7.1 The start corridor is the corridor that runs away from the start. The end shall be clearly marked and only after this
point can the competitor start searching for the transmitters. The start corridor shall not be longer than 400
metres.
S7.2 When leaving the spectator control, competitors shall run along the spectator corridor. The spectator corridor
shall not be longer than 300 metres. The spectator control shall be placed at the entrance to the spectator
corridor.
S7.3 The finish corridor is the corridor that shall be run from the beacon to the finish line. The finish beacon shall be
placed at the entrance to the finish corridor. The finish corridor shall not be longer than 400 metres.
S8. General arrangements
S8.1 Competitors waiting for the start shall be well separated from any other people (spectators and competitors who
already finished their races) once the first competitor has started.
Rules for the ARDF Foxoring Competition
F1. Basic explanation
Foxoring is a special format of the ARDF competition. Its main features are as follows:
 At the start, competitors get competition map with marked start, finish beacon and nominal positions of the
transmitters.
 Transmitters except for the finish beacon are placed close to their nominal positions marked on the maps.
 All transmitters except for the finish beacon are very weak and therefore audible only at the close vicinity of
the antenna. All transmitters operate continuously.
 The RF field strength of each transmitter is adjusted so that :
◦ the transmitter is clearly audible at its nominal position marked on the map AND at the distance of 30m
from its real position
◦ the transmitter is NOT audible at the distance of 250m from its real position.
 Competitors shall run to the close vicinity of the transmitters by means of the map and then complete the
final approach by means of the direction finding receiver.
The Foxoring Rules are based on the Rules for Championships in Amateur Radio Direction Finding. The points as stated
below replace identically numbered points of part A and B of the Rules.
F16. Training / model event
F16.1 For training purposes the organising society shall offer a model event on the day prior to the competition to
demonstrate the transmitter features, the set-up of transmitters and antennas, the registering devices etc., which
will be used in the competitions. One transmitter of each frequency which will be used in the competition shall be
installed.
F17. Starting order
F17.6. Competitors from the same category may not start at the same time in the foxoring competition.
F17.7 The competitors within one category start at equal start intervals. Minimum start interval is 2 minutes.
F17.8 All competitors of a particular category shall start in the same start corridor
F20. Courses
F20.3 Transmitters including the finish beacon shall be located not less than 250 meters apart. The transmitter nearest
to the start shall be located not less than 250 meters from the start.
F20.7 Number of transmitters and course lengths assigned to particular categories:
Category number of transmitters effective course length
W19 5…8 + finish beacon 4…6 km
W21 6…10 + finish beacon 5…7 km
W35 5…8 + finish beacon 4…6 km
W50 4…7 + finish beacon 3…5 km
W60 4…7 + finish beacon 3…5 km
M19 6…8 + finish beacon 6…8 km
M21 8…10+ finish beacon 7…9 km
M40 6…8 + finish beacon 6…8 km
M50 5…8 + finish beacon 5…7 km
M60 5…8 + finish beacon 4…6 km
M70 4…7 + finish beacon 3…5 km
F23. Maps
F23.3 The competition map shall cover the whole competition area including start, finish beacon and all transmitters.
The map start (the point where competitors obtain the maps), nominal positions of all transmitters assigned to the
particular category, finish beacon and the finish corridor shall be clearly marked on the map. The start is marked
ARDF RULES — Part B / 2015 — valid from January 1st, 2015 Pg 21
by a triangle (symbol 701), all transmitters by a circle (symbol 702), the finish corridor by a dashed line (symbol
705) and the finish by two concentric circles (symbol 706).
F23.6 Maps shall be protected against moisture.
F26. Start
F26.1 On arrival at the competition area, competitors shall keep their receivers. Spare receivers and components,
clearly marked as property of a particular team or competitor, shall be placed at an indicated point just beyond the
starting line beside the starting corridor.
F26.5 Competitors shall enter the pre-start area not earlier than FIVE MINUTES before their own start. Competitors
receive maps after their start, at the starting line or at the indicated point within the starting corridor.
F27. Transmitters
F27.3 Each transmitter shall be clearly audible during the whole competition at its nominal position marked on the map
AND at the distance of 30m from its real position. Transmitters shall NOT be audible at the distance of 250 m
from their real positions. The finish beacon operates at normal power and therefore shall be clearly audible during
the whole competition from the start point.
F27.9 All transmitters except for finish beacon have no flags. Registering devices shall be placed no more than one
meter from each transmitter.
F27.10 not valid
F28. Transmitters arrangement
F28.2 There are number of transmitters in the competition area plus the finish beacon. Transmitters shall operate
continuously.
Technical Specifications for ARDF Foxoring
FT2.6 Specifications for the 3.5 MHz transmitters:
 Carrier frequency 3510 … 3600 kHz
 Frequency stability better than 50 ppm
 Channel spacing between the beacon and other transmitters 30 kHz minimum
 Undesired products level conforming to the national regulations
 Output RF power (finish beacon) 1 … 5 W
 Output RF power (other transmitters) 10 mW
 Mode A1A (keyed unmodulated carrier)
 Keying speed 8 … 15 WPM
 Antenna (finish beacon) vertical
 Antenna (other transmitters) vertical (approx. 30 cm long)