Orienteering Raleigh NC

Backwoods Orienteering Klub, founded November 15, 1978 sponsors events and teaches orienteering in the North Carolina piedmont, around Raleigh, NC.

We invite you to try orienteering with us. Everyone is welcome at all our events. We always offer beginning, intermediate, advanced and expert courses (routes through the woods) at every Regular event.

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Latest News

December 17th, 2017

Carolina Orienteering Klub Event Schedule

Carolina Orienteering Klub (COK) is centered around the Charlotte area.  For more information check out the Carolina-OK.org website or their event calendar.

Here is the COK 2018 scheduled events…

Morrow Mountain State Park

January 6, 2018 – 10:00 AM to 12:00 PM
Morrow Mountain, 49104 Morrow Mountain Rd
Albemarle, NC 28001 United States 
+ Google Map

Reedy Creek Nature Preserve & Park

February 3, 2018 – 10:00 AM to 12:00 PM
Reedy Creek, 2900 Rocky River Rd
Charlotte, 28215 United States 
+ Google Map

NIGHT-O (2018)

February 10, 2018 – 7:00 PM to 10:00 PM
McDowell Nature Preserve & Park, 15222 York Rd
Charlotte, NC 28278 United States 
+ Google Map

Kings Mountain National Military Park

March 3, 2018 – 10:00 AM to 12:00 PM
Kings Mountain National Military Park, 2625 Park Rd
Blacksburg, SC 29702 United States 
+ Google Map

Kings Mountain State Park (Lake Crawford)

April 14, 2018 – 10:00 AM to 12:00 PM
Kings Mountain State Park, 1277 Park RD
Blacksburg, SC 29702 United States 
+ Google Map
December 12th, 2017

Score-O Results

    10 Dec 2017, Umstead State Park This year’s long score event at Umstead came on a beautiful, though chilly, Sunday in the Piedmont. The course was especially long, offering 47 controls to runners in either a 2-hour or a 6-hour race. The course stretched so far to the southeast that a new map […]

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December 4th, 2017

Results for Open event at Raven Rock State Park (Dec 3, 2017)

It was such a nice day for being in the woods. Couldn’t have been better! We had a pretty good turnout at Raven Rock State Park – 51 starts! Thank you all for coming. It is a hard forest to get through and the map hasn’t been updated for many years. Both factors were in […]

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November 30th, 2017

80 m Radio “O” Receivers

BOK received the first four of our 80 m ARDF (Radio “O”) receivers from Vadim.  BOK will be renting these receivers at our Radio “O” events. (Bring your own headset.) I put them through a test and they are excellent.

  • They are very lightweight, just under 9 ounces, which is important if you are holding it up and waving it around for an hour or two.
  • The sensitivity is excellent, I can hear my practice 50 mW transmitters from over 1k.  Typical competition transmitters transmit closer to 1 W.
  • The sense differentiation is exceptional – no volume change when you activate the sense switch when the receiver is pointing toward the transmitter and almost silent in the reverse direction.  On many receivers the difference is quite subtle.  It is even excellent close to the transmitter.  With some receivers when you are close to the transmitter the sense differentiation is lost because it is overpowered.
  • Very tight null discrimination.  When you are taking a bearing to a transmitter the signal is very quiet when you are looking through the loop, (as in the picture) and loud when you are holding the receiver sideways looking edge on to the loop.  The quiet signal, looking through the loop, is very narrow.  Just a couple of degrees off of perpendicular you get a noticeably louder signal so you can take an accurate bearing.  When you are looking edge on to the loop it is about the same volume plus or minus about 10 degrees, so an exact bearing is difficult to determine.  You would use this edge on orientation if you were far away and had a very weak signal.
  • Frequency drift is sometimes a problem with analog receivers.  This test was over an hour in cool weather and there was no drift.  This will be more critical when we test it in the summer.  Frequency drift requires that you re-tune the frequency knob from time to time.
  • Whoopie is an advanced feature on a receiver.  When the signal strength increases to a certain level you can hear a series of clicks.  As the signal increases further the clicks come faster and faster until when you are really close it is a screech.  (Waiving the receiver back and forth when you are getting close the sound goes from clicks to screeches, and thus the name Whoopee.) As you turn down the gain (volume) it will go back to being clicks again.  To set this up to measure distance you make marks on your gain knob to show where the clicks begin at different distances like 500, 250, and 100 meters.  This will give you an approximate distance to the transmitter.  Since different transmitters have different power outputs you need to calibrate your marks when you are using different transmitters.  This is why at major events there is always a practice period for people to experience the characteristics of the transmitters that are being used.  The distance is just approximate because the density of foliage, moisture on the leaves and in the air, differences in antenna setup, and topology between you and the transmitter all affect the measurement.  You also need to be certain that the frequency setting hasn’t been bumped a little or drifted.  With my 50 mW transmitters the whoopee starts at about 100 m.
  • The frequency knob is very sensitive so a tiny movement makes a big change.
  • The receiver uses a standard 9v rechargeable Li battery and has a socket for the cord that snaps to a standard Li 9v charger.  When it begins to lose power in a couple of years it will be easy to replace the battery ourselves.
  • The receivers use a standard cell phone headset.  That is a 3.5mm plug with 3 contact rings (2 black stripes).  The headsets with microphones have 4 contact rings (3 black stripes) and will not work.  When you rent one of the receivers you should bring your own headset.
November 30th, 2017

BOK 2017 Annual Meeting

We met at Joseph & Ruth’s house on November 1, for our 2017 Annual meeting.
Financial Report was first on the agenda.  Ruth passed out the report and we saw that BOK is in a good position financially.  We decided that we should add an expense category to track what we are spending for equipment maintenance.
Next was the election of board members.  Only Vladimir’s term was up.  Mihai nominated Vladimir, seconded by David and then Vladimir nominated Lina and Lina was elected for a 3 year term.  The current directors are:
  • Lina 2020
  • Ian 2018
  • Ken. 2018
  • Joseph 2019
  • Mihai 2019
We have extensive mapping plans for 2018.
Scout Camp Durant is currently being mapped by Dave. If we add Camp Reeves we will have a good venue for long courses.  We made an arrangement with the scouts to hold several events per year.
Dorothea Dix in downtown Raleigh.  Dave has drawn the base map using LIDAR and Open Maps.  This will be a good sprint map.
The North side of Eno River – base map exists, topo seems to be good quality.  This will be an addition to our existing Eno River map.
Other mapping that we are looking into for the future:
Brumley in Orange County – 2.5 sq. km. owned by the Triangle Land Conservancy
Horton Grove (N. of Durham – 2.8 sq. km.),
Johnson Mill (1.2 sq. km.)
Addition to our existing maps:
Refresh Umstead Park map – at least the “Bermuda Triangle” (just north of the Reedy Creek parking area) , but also the old trails.
Fill in the holes in the middle of Birkhead to complete the Wilderness map.
We are investigating hiring a professional orienteering mapper, possibly in conjunction with another club.
Event & Membership Fees
We decided that there is no need to increase entry or membership fees. However, we decided that when a non-member is starting on a second course we will charge an additional $2 whether they need a map or not.
Radio “O” is attracting participants.  We agreed to purchase 8 receivers to rent and earmarked $2000 for transmitters. Everybody who rents a receiver will need to bring their own headphones (3.5mm TRS plugs – 3 bands – no microphone). We will track Radio “O” financials separately.
We decided to increase the number of events, hopefully adding an extra open event every other month.  This is evident in our 2018 schedule.
We discussed what we can do to make holding an event easier.  The first idea was to have two people assigned to an event.  We also felt having three people to handle the registration, start, and finish would help the event director(s) and make the events run more smoothly.
Now that we have a small computer that has a battery that can run for a whole event we are looking into real time event software.  We want to research the existing solutions.
We also want to look at online forms for pre-registration and paying in advance to speed up registration at events and printing the correct number of maps.  We would like a committee to look into this and make recommendations.
We discussed the “Special Events” that we are hosting – Extra Long events and multi day events.  We decided that we should increase the entry fee, not just to raise money, but to increase the perceived value of the event.  We decided that there should be special discounts for members.
Much thanks to Mihai for taking the notes for these minutes.
Joseph Huberman, President, BOK