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

March 15th, 2025

2025 USA Radio Orienteering Championships

The 24th US Radio Orienteering Championship

We welcome everyone to join us in Central North Carolina from June 14 – 22, 2025

Basic Schedule

  • Practice Days
    • Saturday & Sunday, June 14-15, 2025 – FoxO & Sprint
    • Monday, June 16, 2025 – 2m & Sprint
    • Tuesday, June 17, 2025 – 80m & Sprint
  • Equipment Check, Pre-Event Meeting & Pizza Dinner
    • Wednesday, June 18, 2025 – All transmitter types
  • Championship Races
    • FoxOring – Thursday, June 19, 2025
    • Sprint – Friday, June 20, 2025
    • 2m – Saturday, June 21, 2025
    • 80m – Sunday, June 22, 2025
  • Late fees begin May 1 ($5 per day)

March 12th, 2025

Sprints at Dix Sunday March 23

Note that the date has changed from Saturday to SUNDAY

  • What: 2 Orienteering Sprints and a full Radio-O sprint with 10 controls
  • Date: Sunday March 23
  • Starts: 11am – 2pm
  • Course Closes: 3pm
  • Where: Dix Park just NW of the intersection of Hunt Dr and Umstead Dr. (35.771353, -78.661836)
  • Registration closes Friday March 21, Midnight

Everyone is welcome at this event. There will be two orienteering sprits with Long and short versions as well as a full Radio-O sprint.

January 15th, 2025

Results – Gray Owl Expert Orienteering, Fox-O, Night events, and 6 & 12-hour Virtual Rogaine 2/1/25 & 2/2/25

On February 1st, BOK held a rogaine training event starting/finishing at Gray Owl in the NE corner of Birkhead Mountains Wilderness. This consisted of two 6-hour “loops” (one during the day and one during the night). Most of the controls on each course didn’t have physical flags. Instead, participants had to use the UsynligO and […]

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December 16th, 2024

Results – Radio-O 2m Short Classic and Sprint at Carl Alwin Schenck Memorial Forest on Sunday December 15 2024

We have had a nice day outdoors catching radio waves. The weather cooperated giving us a nice sun shine in the middle of December. Thank you all for coming. The directors would extend very special thanks to the BOK for scheduling the event, reserving the place, and providing rental equipment, Charles for his tremendous help […]

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December 9th, 2024

Radio-O 2m Short Classic and Sprint at Carl Alwin Schenck Memorial Forest on Sunday December 15 2024

  • We will have a standard 2 meter medium length classic as well as a short sprint course
  • Courses open: 10:00 am
  • Courses close: 3:00 pm. You must be out of the woods and back at check-in by 3:00 pm.
  • Time limit: No time limit.
  • Check-in: Shelter at the Carl Alwin Schenck Memorial Forest. 35.816092, -78.723203

Last minute updates:

  • Full 2 m course (1, 2, 3, 4, 5) – 3.6 km
  • (2, 3, 4, 5) – 2.8 km
  • (2, 3, 4) – 2 km
  • There are two creek crossings on the full 2 m course. Unfortunately after last rains the creek has water. Two suggested crossings are marked on the map. They are shallow but you will see 4 – 5 inches of water. It is not recommended to cross on the fallen trees unless you have excellent balance. Doctors say that you are not going to catch cold when running. After a run dry socks/shoes are suggested. If you do not want to get wet avoid #1.
  • Full Sprint – 2.2 km
  • Half Sprint (Start – 1f, 2f, 3f, 4f, 5f – Beacon – Finish) – 1.3 km

Registration closes at 5 pm on Friday 12/13

Event Directors: Evgeny Danilov, Erin Hammer