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Thermal and wind indication
The unit indicates the position of the last encountered thermal,
which is in effect, the last position with the highest rate of climb.
The wind direction is indicated as soon as a change of course is
flown.
The best indication of wind direction is gained by flying a full
circle.
N
E
S
W
The
position of the arrow in the compass ring
indicates the
direction to the last thermal.
The
distance the arrow is from the centre
indicates how far the
thermal is away; the further away the thermal, the further the arrow
will be from the centre. An arrow in the centre indicates the
thermal is very close.
The
length of the arrow
gives an indication of the strength of the
thermal; a longer arrow indicates a stronger thermal.
The last thermal is approached by flying until the arrow is
positioned at the top of the compass ring and then flying straight
ahead. When the arrow is in the centre of the compass ring, the
thermal has been reached.
Wind from
SW
Last thermal
NE of
present position
