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

October 19th, 2026

Results – Gray Owl 3 day Oct 16-18

This was a terrific weekend. It went from summer through fall into winter. Friday was HOT. One person came back with heat stress. Then it poured Friday night for a cool drizzly Saturday morning clearing up in the afternoon, and a cold Sunday. We built a fire in the fire pit and stood around for […]

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October 4th, 2026

Results Oct 4 – Umstead S Open-Orienteering & 2m Radio-Orienteering

On Friday, the forcast was for rain all day, and by Sunday it stopped before 10am and stayed cool and “dry” for the rest of the day. OK, the humidity was about 100%. Those who commented thought the courses were tough, there were some, but not too many DNFs. A big thanks to Dave Waller […]

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September 13th, 2026

Radio-O Forum for Everyone

When: Tuesday, Sept 15 8:30pm
Where: Google Meet http://meet.google.com/ama-bpex-yrv

This Tuesday, Sept 15, Joseph is going to host a forum on Radio Orienteering. Everyone is welcome to join. The presentation runs about 15 minutes, and there will be plenty of time to ask questions.

BOK is the center of Radio Orienteering in the United States. Orienteering USA, our National Orienteering Federation, has embraced Radio Orienteering as one of the orienteering formats along with mountain bike-O, Ski-O, and Trail-O.

This forum is a great opportunity to learn about Radio-O. Following the forum, you can attend one of Nadia’s beginner classes on September 27, and then practice your new skills at a 3-day Radio-O and Orienteering event at Gray Owl on October 16-18.

August 31st, 2026

Radio Orienteering Beginner Classes

Three Sundays (not consecutive) – Sep 6, 13, and 27

Learn Radio Orienteering (ARDF) as the pros learned it. Nadia Scharlau got her start in ARDF at age 13 and went on to become a world champion, and taught classes to beginners who became world champions themselves. She still uses the same no-frustration, step-by-step approach she used to learn the sport. Now you can learn that way too.

Classes are free, but you need to register:

There will be a 5-control 80m classic course (3.5- 4.5 km length) for class graduates and experienced radio orienteers. Experienced radio orienteers wanting to run the classic course for practice must also register.

Details

  • Dates
    Three Sundays (not consecutive) – Sep 6, 13, and 27
  • Location
    Address: 6898 Stagville Rd, Bahama, NC 27503
    GPS: 36.141983, -78.851534
    This is a private residence not far from Horton Grove. Please drive slowly on the gravel roads and park only in the indicated locations near the house. Do not drive into other driveways (this one is marked “6898” on a stone pillar at its entrance).
  • Start Time: 11 am (Everyone should arrive by 11 am)
  • Course Closes: 2:00 PM (but class finishes earlier)
  • Event Director: Nadia Scharlau, KO4ADV

There will be two unique class sessions with new material for those who can attend both days. The third session is a short course for individual practice and also serves as a make-up day for anyone who missed an earlier class. Both class sessions and the practice course are available all three days. (But you can only participate in one activity per day because they are held concurrently.) If you can’t make all three, attend the day(s) you can.

Class 1: A short beginner course with constantly operating transmitters. You will learn how to use your receiver.

Class 2: A longer beginner course with “cycling” transmitters. You will learn how to efficiently locate radio-orienteering “foxes”.

Class 3: Go solo on a “cycling” beginner course to practice your skills / Make-up day.

We will be hiking the courses together as a group, so please arrive on time to avoid getting left behind.

Equipment

All necessary equipment will be provided at no charge. New concepts will be introduced in sequence at each session; if you can’t attend all sessions, come when you can. Previously covered concepts will be reviewed each time, so you can jump right in.

Those who have completed the first class session can elect to use a competition-grade receiver, which can be rented for $5 per day. A competition-grade receiver operates much like the instructional receivers used in the classes but offers improved sensitivity and frequency stability, providing an experience closer to that of competitors. Renting a competition-grade receiver is optional, but suggested for those who have completed at least one beginner class.

Those who complete the first two class sessions should acquire the skills needed to participate in BOK’s 80m radio-orienteering practice events.

May 19th, 2026

Results April 2026 Gray Owl 3 day (Finally!)

We had great weather for our three-day event, featuring a full set of Radio-O and Orienteering. As usual, the expert runners said the courses were particularly challenging. Is that why it takes 3 days to set out all the courses? Of course the two Radio-O controls that had problems were the furtherst out, so many […]

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