7.5 Turn Points and Assigned Areas

7.5.1 The Observation Zone for a GNSS Turn Point shall be a cylinder of radius 0.5 km, centered on the turn point.

7.5.2 An Assigned Area shall be formed by:

a. A circle of a given radius, centred on the central GNSS position, or

b. Two radials originating at the competition site, or any other designated point, intersecting with arcs located between a minimum and/ or maximum distance from the site or from the designated point, with the central GNSS position lying on the bisector of the radials halfway between the minimum and maximum defined distances.

The edge or boundary of the Assigned Area should lie within the defined Contest Area Boundary.

7.5.3 Organisers must avoid setting Turn Points or Assigned Areas close to Start Points. Assigned Areas that follow one another must not overlap.

Note that the last Assigned Area in a task may enclose the finish, if the finish ring is used.

7.5.4 A Turn Point or Area rounding is valid if the GNSS FR shows a valid fix or a straight line between two subsequent valid fixes within the Observation Zone.

7.5.5 If there is no proof that the competitor passed through the Observation Zone the rounding of the Turn Point or Assigned Area may be validated if the competitor was within 500 m of the boundary of the Observation Zone, but a penalty shall be applied.