Radio Orienteering

Amateur Radio Direction Finding (ARDF)

Welcome to Radio-O.  Here is how it works! We provide a radio receiver with a directional antenna, an orienteering map, a compass, and a finger stick. By pointing the antenna and listening to the signal you can determine the direction of the signal.  Using this information you navigate to the transmitter and punch in with your finger stick. Only the start and finish are marked on the map and it is important to keep track of where you are.  To qualify as finishing you must find at least one transmitter on your course and reach the finish within the time limit. To calculate results -- first; the number of assigned transmitters you found, then; your time on the course. We offer beginner through advanced courses, Regular BOK fees apply, and Pre-Registration is required.

Latest News in Radio Orienteering

May 21st, 2017

Open Radio-O (ARDF) event at Carolina North Forest, Sat. Jun-3.

Get ready for the second open ARDF event of 2017, Sat. June 3! For more information about Radio-O/ARDF, see the BOK ARDF page. Starts 11:00 AM to 1:00 PM. Course closes at 3:00 PM. We will meet at the East Entrance to Carolina North Forest. Take Municipal Drive off of MLK Jr. BLVD. (Parking lot GPS: 35.936168 -79.065907, google maps link).

Open event with pre-registration required: This is an open event. You don’t have to be a BOK member but you still need to pre-register. This will ensure everyone gets a receiver. Soon after registering, we will send you an e-mail letting you know that we have reserved a receiver for you. When we run out, we’ll post an announcement on the BOK website and any subsequent registrations will be put on a wait list in case someone cancels. If you’re not a member of an orienteering club, go ahead and choose “Other O Club Member” anyway in the registration form. Here is a link to the registration page. Groups of 5 or more separate entries may register using the group registration procedure.

There will be a class at 12:00. Following this, Patrick will take beginners as a group out on the course to hunt for the foxes.

Courses provided: The course layout will be similar to an 80m (3.5 MHz) classic ARDF course.

white 1 fox 1.6 km
yellow 2 foxes 2.0 km
orange 3 foxes 3.0 km
green 4 foxes 4.0 km
red 5 foxes 4.6 km

There is no brown.

Chapel Hill-Carrboro City Schools: Everyone from the CHCCS ARDF community is welcome. Note that this is not a school event. BOK fees apply. Free for BOK members. All others $10 ($5 for entry + $5 for stick rental). Several people going together count as one entry (just $10) and includes one map. Extra maps are $2 each. For more info, see What will it cost? Also, you must register with BOK, not on the usual registration page for CHCCS events. Students in middle school will need to go with a parent if they want to search for all five foxes.

Rain: Unlike regular orienteering meets, we may cancel this event if the rain is too heavy. If we cancel, we’ll post it on the BOK website and try to reschedule.

May 15th, 2017

Results – May-13, 2017. Radio-O/ARDF Carolina North Forest

The weather was perfect for running at Carolina North Forest (CNF). It threatened to rain just a bit but we stayed dry the entire time. We even had some patches of blue sky float by. Some orienteers arrived before noon, got instruction, felt confident, and headed onto the course early. Most of the participants took […]

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April 26th, 2017

Open Radio “O” (ARDF) event at Carolina North Forest – Sat. May 13.

2017-05-13 4:40 AM update:  The event is on!  The NWS hourly forecast looks good.  See you all out there.

Get ready for the first open BOK Radio “O” ARDF event of 2017! Everyone is welcome. We will be hosting the meet at Carolina North Forest on May 13. Starts 11:00 AM to 1:00 PM. Course closes at 3:00 PM. We will meet at the East Entrance to Carolina North Forest. Take Municipal Drive off of MLK Jr. BLVD. (Parking lot GPS: 35.936168, -79.065907, enter this in the search field of maps.google.com).

What to bring:
We will provide all the equipment. But bring a whistle (for safety) and a compass if you have them. We will provide ARDF receivers (registration required). You may bring your own if you have one.

Pre-registration is required and is now open:
You can register on the registration page. Even though this is an open event, everyone wishing to attend needs to pre-register. We have a limited number of receivers to loan. Soon after registering, we will send you an e-mail letting you know that we have reserved a receiver for you. When we run out, we’ll post an announcement on the BOK website and any subsequent registrations will be put on a wait list in case someone cancels. Groups of 5 or more separate entries may register using the group registration procedure.

There will be a class at 12:00.
Following this, Patrick will take beginners as a group out on the course to hunt for the foxes. Anyone in the group who feels confident can go on ahead whenever they wish.

What’s  Radio “O” known world wide as ARDF?
Amateur Radio Direction Finding. For more information, see the BOK ARDF page. At this event, we will have one 3.5MHz (80m band) course. It will have 5 regular controls (foxes) plus one homing beacon to get back to the start.

Several levels will be provided.
You can search for just one fox or more. You will be told which ones to search for. If you’re searching for more than one, you can search in a known easy order, or search without knowing the best order. Everyone gets to look for the homing beacon. There may be other options.

Course lengths:
– 1 fox: 1.8 km
– 2 foxes: 2.4 km
– 3 foxes: 3.0 km
– 4 foxes: 4.0 km
– 5 foxes: 4.8 km

Chapel Hill-Carrboro City Schools:
Everyone from the CHCCS ARDF community is welcome. Note that this is not a school event. BOK fees apply. Free for BOK members. All others $10 ($5 for entry + $5 for finger stick rental). Several people going together count as one entry (just $10) and includes one map. Extra maps are $2 each. For more info, see What will it cost?. Also, you must register with BOK, not on the usual registration page for CHCCS events. Students in middle school will need to go with a parent if they want to search for all five foxes.

Rain:
Unlike regular orienteering meets, we may cancel this event if the rain is too heavy. If we cancel, we’ll post it on the BOK website and try to reschedule.

September 20th, 2016

2017 NC International ARDF Champs in & The US ARDF Championship in Ohio

These are the current  plans.
Check back for updates

North Carolina International Training and ARDF Championship in Asheboro, NC
July 24 – 28, 2017

BOK will host the North Carolina International ARDF Championship event from July 24 – 28, 2017.  The event center will be at 1725 Gray Owl Road, in Asheboro NC.  The first day will be a training event focused on map reading.  The next four days will be: FoxOring, Sprint, 2 m and 80 m competitions.

We cordially invite our Sister Club, the Guangdong ARDF Radiosports Club and Radio Sport competitors of all levels from around the world to attend.

Participation costs are estimated at $10 per person per day There is no predetermined fee. Costs for the event will be shared by the participants.  All travel, lodging, and meals are the responsibility of the participants and are not included in the participation cost.  Hotels and restaurants are available in Asheboro, 15 minutes from Gray Owl.

Registration Form:

North Carolina International Training and ARDF Championship in Asheboro, NC July 24 - 28, 2017
  1. (required)
  2. (required)
  3. (valid email required)
  4. Check the events you are attending
  5. If you change your plans please return and remove your registration here.
  6. Please answer the question to prove you are human.
 

Joseph Huberman
President, Backwoods Orienteering Klub
Ruth Bromer
Event Directors, North Carolina ARDF Championship

2017 US Championship Ohio
July 31-August 6, 2017

Event dates are 31 July to 2 Aug 2017, for the training events, and 3-6 Aug being the championship events.

Event Website: ARDFUSA.com

The classic courses are centered near Miami Whitewater Forest near Harrison, Ohio.

The current competitive event plans are:
Thur: Fox O
Fri: Sprint, model, competitor meeting
Sat: 2m Classic, Evening banquet
Sun: 80m Classic

Training Camp current ideas:
The thinking on the M-W practices is to start fairly early and finish in the early afternoon. It can rain anytime, but afternoon showers are likely on any given day. We’re hoping for an advanced track (probably two 3-4 km 5T events) and a beginner track with some instruction. Depending on who comes we can react to attendees’ needs. We’re thinking one park per day, or at the most two parks in one day that are very close together.

Following is a list of potential parks that will be used for either practice events or competition.

As of February 1st these locations are to be considered “OFF Limits” for all potential competitors in the 2017 ARDF Championships.

  • Miami Whitewater Forest – Harrison, Ohio
  • Diamond Oaks Campus – Dent, Ohio
  • Mitchell Memorial Forest – Delhi, Ohio
  • Pyramid Hill – Hamilton, Ohio
  • England-Idlewild Park – Burlington, KY
  • Harbin Park, Fairfield, Ohio
  • (Backup locations in Kentucky, Not on Map)
    • Big Bone Lick State Park
    • Middlecreek Park

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Transportation to Ohio

Transportation
The following Airports are available for travel to the 2017 Championships.

  • CVG – Greater Cincinnati/Northern Kentucky International Airport
    • Approximately 28 Miles to Harrison, Ohio (32 minutes)
  • Day – Dayton International Airport
    • Approximately 74 Miles in Harrison, Ohio ( 1  Hr 15 Minutes)
  • IND – Indianapolis International Airport.
    • Approximately 100 miles to Harrison, Ohio ( 1 Hr 40 Minutes)

Camping
Miami Whitewater Forest Campground. 9001 MT. HOPE ROAD, HARRISON, OH 45030 | 513-367-9632. Lat/Long: 39.257/-84.749

August 16th, 2016

Radio-O Courses Offered at BOK

Radio-O was born in Eastern Europe around the time of the First World War when commanders communicated with troops using radios.  When the radio was broadcasting you could get a bearing on the enemy.  So getting an accurate bearing quickly and careful map reading was important.

We offer 4 levels of Radio Orienteering.

  • Radio White 2-3 k – There are 5 numbered controls with transmitters that stay on all the time.  Each transmitter broadcasts on a different frequency.  You find the transmitters in the assigned order by tuning in the correct frequency and using the directional radio receiver to locate the controls.
  • Radio Yellow 2-3 k – The transmitter setup is similar to White, but you can take them in any order so in the beginning you can listen to all the signals to make a good decision.
  • Radio Orange 3-6 k – Again there are 5 transmitters coded 1-5, however, now they are all on the same frequency.  Each one stays on for a minute broadcasting its code and then shuts off so the next one can start.  After they all take a turn it starts over.  You take an assigned subset of the transmitters in the assigned order.
  • Radio Expert (Classic ARDF) 4-8 k – Similar to Orange except you have to determine the order and may be assigned more transmitters.

We also offer two other styles of Radio Orienteering.

  • Radio Sprint 2 k – One or two loops of 5 transmitters per loop.  All the transmitters on a loop are on the same frequency.  Each transmitter stays on for only 12 seconds before handing off to the next transmitter, so the whole cycle of  5 transmitters takes one minute.  Each loop is on a different frequency.
  • FoxOring 3-8 k – FoxOring has a stronger orienteering component because the approximate locations of the transmitters are marked on the map.  The transmitter and control may be as far as 100m from the location marked on the map.  As you approach the marked location you will be able to tune in the very low power transmitter to locate the control.  Like the others, you may not be assigned all the transmitters and your place is determined first by how many transmitters you found and then by your time.