A Rules for Foot Orienteering Events - Orienteering USA

D.17.1 At least two timed controls where the decision time is recorded should be
included in the course. These may be located at any part of the course; but it is
desirable that at least one occurs before the official start and another after a prefinish.
A separate, specially prepared map is used for each timed control.
D.17.2 The terrain detail at a timed control shall not be shown on the competitor’s maps,
where this may be studied by competitors before they are called to the timed
control.
D.17.3 At timed controls the competitor shall be seated in a position so that all the
control markers are visible and the markers shall be pointed out in order using the
phonetic alphabet (Alpha, Bravo, Charlie, Delta, Echo).
D.17.4 Immediately after the markers are pointed out, a map unit containing a segment of
the map oriented in the direction of view of the control, with clear indication of
the direction of magnetic north above the map segment and control description
below the segment, shall be handed to, or placed for, the competitor as the timing
starts. An example timed control map can be found in Appendix A.
D.17.5 The competitor shall not be given time to study the markers between the pointing
out of the markers and the handing of the map/start of timing.
D.17.6 Timing shall be with stopwatches.
D.17.7 At timed controls timing is stopped when a clear answer is indicated. This may be
either by the use of a pointing board or orally using the International Phonetic
Alphabet.
D.17.8 The planner shall not set a None/Zero answer as a timed control.
D.17.9 At timed controls a maximum of one minute is allowed. A ten second warning is
given at 50 seconds.
D.17.10 Two timekeepers are preferred with the times from both recorded. The
times shall be rounded down to whole seconds.
D.17.11
Both time and answer are recorded.
D.17.12 The timed control officials shall not give any indication to the competitor
of the correctness of their response.
D.18 Control Set-up
D.18.1 The control point given on the map shall be clearly marked on the ground by a
cluster of control markers in the vicinity of the circle.
D.18.2 Control markers shall consist of three squares 30 x 30 cm arranged in a triangular
form. Each square shall be divided diagonally, one half being white and the other
orange.