A Rules for Foot Orienteering Events - Orienteering USA

D.18.3 The control markers shall be hung so that they are all visible (at least one third of
any marker) to competitors from the close vicinity of the decision point. Normally
a marker is positioned at the feature at the centre of the circle on the map and
correctly described but it is permitted to have no marker so located.
D.18.4 The control markers shall be hung at a standard height in any one cluster.
D.18.5 A decision point will be marked in the terrain along the route, but not shown on
the map. No competitor must be tempted forward of this marker towards the
control cluster. If deemed necessary tapes should be placed in the terrain
D.18.6 Control markers are designated from left to right, regardless of depth of view,
‘A’,‘B’...'E’ from a decision point. The decision as to which marker is which is
made from this point.
D.18.7 Ambulant competitors must not be able to get closer to the marker than
wheelchair users, nor should they be able to get a better view by climbing any
feature behind the decision point. Such a feature should be taped off as out of
bounds.
D.18.8 Everything relevant to decision making for a control shall be visible to someone
sitting in a low wheelchair.
D.19 Control Cards and Punching
D.19.1 Manual pin punch with control card shall be used.
D.19.2 The control card must satisfy the following specifications:
a) it must be made of resistant material, or be protected
b) each punch box must have a minimum side length of 13 mm
c) a duplicate must be marked automatically with the main card.
D.19.3 Competitors shall be issued a double card. The complete card shall be handed to
officials at the finish, the second part being returned, after the last start time, to
the competitor for reference.
D.19.4 Competitors record their choices at a punching station a short distance beyond
each decision point. A single punch shall be provided. A different pin pattern to
those at adjacent controls must be used.
D.19.5 Competitors shall record their choice at each control before moving on to the next
control. With manual punching the control card must be punched in the chosen
box.
D.19.6 Competitors are responsible for the correct recording of their choice, whether
doing so themselves or through an intermediary.
D.19.7 Any control with more than one, or no, selection recorded is deemed to be
incorrect.