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

December 3rd, 2019

Dix ARDF Sprint & Orienteering Dec. 8, 2019

This event will have 2 levels of ARDF (Radio Orienteering) and two lengths of Regular Orienteering. You can mix and match however you want.

  • Location: Small shelter at 1800 Umstead Drive
    • GPS 35.771397, -78.661485
  • Date: December 8, 2019
  • Time: Starts 11am – 1pm
    • Course closes at 2pm
  • Type: ARDF Radio Orienteering Sprint & Orienteering Middle Distance
    • Everyone is welcome
    • We will have a class at 11:30, and additional ARDF help throughout the day.
  • Registration: You must register in advance at the BOK store by Friday evening December 6th.
  • Orienteering Courses: High speed Middle Distance courses. Green ~5.6k and Brown 3.5k. These courses ar all in the open park, no need for
  • ARDF Courses: ARDF sprint courses are designed in two halves. You set your frequency and then start and find 5 controls. Next you change your frequency and find the Spectator Beacon which is the control that divides the two halves. Then you change frequencies and find the next 5 controls. Finally you change frequencies, find the Finish Beacon and run in to the Finish.
    • First Half : “Slow” In usual ARDF sprints each transmitter is on for 12 seconds and then the next transmitter comes on. This makes it particularly difficult for beginners to get the bearing. So we are going to set the first half so the transmitters will be on for 30 seconds before the change to the next transmitter.
    • Second Half: “Fast” This will be the standard 12 second transmitter transmit time.
    • Options for your courses:
      • Just Slow: Start as usual then after you punch the Beacon you then punch the finish
      • Just Fast: Start as usual then after you punch the Beacon you then punch the finish
      • Both: Start as usual, punch all the slow controls then the Beacon then punch all the fast controls. Punch the beacon again and then the finish.

The courses will be short probably about 4k for both together. We will update this after the course design is finalized. This is longer than usual because the slow side has 30 seconds on instead of 12 seconds. We are intentionally making the slow side longer than usual but much shorter than a classic event.

We will have ARDF instruction throughout the event. If you get started and are having trouble you can return for help and start over if you wish.

We have 6 receivers that we can rent so sign up early to reserve one. When someone returns we can give the receiver to someone else. We will confirm that you have a receiver after you enter. If you are on the waiting list for a receiver you should come at Noon so someone with a receiver has a chance to return.

October 20th, 2019

Open Radio-O/ARDF event at Eno River, Sun. October 27.

We’ll have rain but the event is still on!

We will have an 80 m classic course and a short foxoring course at the Eno River State Park Few’s Ford Access on Sunday, October 27. For more information about Radio-O/ARDF, see the BOK ARDF page. Starts 10:00 AM to 2:00 PM. We will have a class at noon. The course closes at 3:00 PM. Remember there is a $5 fee if you need to rent a receiver. Also, parking fills up fast at the Eno River State Park; car pooling is appreciated.

Open event with pre-registration: Newcomers welcome — you don’t have to be a BOK member. Here is a link to the BOK store event registration. Groups of 5 or more separate entries may register using the group registration procedure. Please register by Friday evening, Oct-25.

Courses provided: There are two types of course, 80 m classic and a beginner foxoring. Getting 5 classic foxes will require a minimum of 5.5 km. Getting 2 foxes a minimum of 2.2 km. The foxoring course has 7 controls you can search for. Getting all of them will require a minimum of 2.7 km.

August 4th, 2019

Results Sunday – ARDF 80m (adults) and 2m (youth) championship

Sunday was the last day of competitions. The adults had a remote start while the kids stayed near the shelter the whole time. Unfortunately, two participants got lost and had to ask for help to find their way back to the finish. Results are below. This concludes our week of events. Thank you all for […]

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August 3rd, 2019

Results Saturday – ARDF 2m (adult) and 80m (youth) championship

On Saturday we had two events: 80m for the youth and 2m for the adults. The adult 2m course turned out to be quite challenging, a lot of competitors came back with fewer controls than they had been assigned, a few even went overtime. The 80m course was easier. Results are below. Tonight we’ll have […]

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August 2nd, 2019

Results Friday – ARDF Sprint Championship

After some scary thunderstorms Thursday afternoon and evening we had a lovely Friday morning at Bond park for our sprint championship. This is a fast paced event, where quick thinking generally beats fast running. Results are below. A few competitors ran overtime. Some of my photos from today are here. Charles’s photos (including the group […]

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