8
MEASURING THROWS
This section explains how to set up the EDM for measuring throws.
Positioning the EDM
Choose a position that has clear lines of
sight to the centre of the circle (8m mark
for jav), the rim of the circle (foul line for
jav) and the landing sector. The EDM
must not be in a position that could be hit
by an implement thrown out of sector.
The EDM operator must be able to
communicate clearly with the recorder.
The EDM can be set up on the track
surface using the three metal base plates
for the tripod legs. The diagram below
illustrates potential EDM locations. Note
the position of the EDM that can be used
for both javelin and shot put.
Set up the tripod
Extend and spread the legs of the tripod. Adjust the legs so that the height of the tripod is level with
the sternum of the operator. This could be in a standing or sitting position. The legs should be
orientated so that operator is between two legs of the tripod when facing the landing sector (see
cover picture). This alignment is modified when the EDM is being set up to measure throws in
adjacent event sites (see diagram below).
The top of the EDM should be roughly level. If the EDM is being set up on grass, press the feet into
the ground. If the EDM is being set up on a track surface, place the base plates beneath the feet.
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