Rule 15.13 Minimum Distance (MDT)

15.13 MINIMUM DISTANCE (MDT)

15.13.1 Competitors will attempt to achieve a mark or valid track point close to the reference point, after flying a minimum set time or distance.

15.13.2 Task data:

a. arrangements of timing

b. minimum set time or distance

c. reference point

15.13.3 The result is the distance from the mark or closest valid track point to the reference point. Smallest result is best.

15.13.4 The scoring position is the mark or best track point after the minimum time or distance has elapsed. Otherwise the scoring position will be the landing position, provided that the balloon has been seen by an official to be still airborne after the minimum time.

Breakdown

A Minimum Distance involves covering as little ground as possible. It establishes a start point for a time limit or distance requirement, and then a minimum amount of time that must elapse before the next point or a minimum amount of distance. In the case of the minimum amount of distance condition, this is functionally similar to the GBM but virtual.

As an example, if this is a time based task then the first point could be a logger mark, and then the second point must not be made until a set time has passed. There is typically no maximum time.

If this is a distance based task, then there is typically a region or airspace or distance that the point is to be measured to.

Because of the virtual nature of this task, enjoy this picture of a balloon inflation.

Task Data Description

Task data:
- - arrangements of timing
    - - This tells the pilot when their timing will begin being tracked. It is usually a logger mark or an event in the flight, such as crossing a certain grid line.
  - minimum set time or distance
    - - This defines the restriction on when the timing may end. It is typically either a set amount of time or distance before another mark or track point (track points record in the background, and show the entire flight).
  - reference point
    - - This is the distance that the set point will be measured to. It may be a coordinate or event, such as track point or logger mark.

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