Image:Ardf transmitter-2m.jpg

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An orienteering control flag, paper punch and electronic punch device (SportIdent) at an ARDF control. The grey box is a immediate results transmitter which reads the data about punches directly from the punch device and send them to the finish where can be used by reporter to anounce preliminary results. The control transmitter (transmitting MOI --/---/..) and its antenna is located in an adjacent tree, about two meters above ground. The athletes find the control using their receiver (in fact the signals leads them to the antenn of control transmitter), they find the control (the color of control flag is orange/white because this combination is not present in the forrest), punch the card and the result trasmitter sends information about the presence of athlete to the finish.

Photo by Dale Hunt WB6BYU of Oregon, USA.

Used with permission.

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GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

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actuel12 mars 2006 à 22:421 065×1 320 (254 Kio)Greudin (== Summary == An orienteering control flag, paper punch and electronic punch device at an ARDF control. The grey box is a two meter transmitter, in this case sending its identification as the second of)

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