points and the Wind Flag. The current traveling direction (bearing) corresponds to the point indicated in
the top of the navigation circle. On the example shown in Figure
3.5
, the bearing is approximately 80º.
Navigation Arrows
When a route is active the direction of next optimal point is pointed by an arrow (larger arrow 1). The
optimal point corresponds to the unique point on the waypoint cylinder which lies along the optimal route
(red route in the Figure
3.6
example). If no route is dened the arrow will start showing the direction to
the takeo, after the takeo is detected (TakeO is the point taken when the Flight Starts)
Figure 3.6: Route Optimisation
During a competition task ight using the optimal tangent navigation saves a substantial amount of time.
The smaller arrow 2 in the Figure
3.6
example points to the centre of next waypoint cylinder (WP1), and
the arrow 3 points to the optimised edge of the waypoint after the next one (WP2). The combination of
all three arrows provides a spatial location of the pilot relative to the next 2 waypoints. The example in
Figure
3.6
shows a hypothetical task. A pilot navigating to the centre of the waypoint (following arrow
2) will probably be ying the blue course, whilst a pilot navigating using arrow 1, so probably ying the
optimised route (red course), will y the substantially shorter route. The direction to the waypoint after
the next one (WP2) is represented by arrow 3. In the example arrow 3 is pointing along the green line,
which shows the direction to WP2, even though WP1 has not been reached. Small course corrections are
sometimes required and these are shown on the LIVE SD by a ne adjustment indicator in the form of
the small arrow 4. Arrow 4 to the left means the pilot should turn slightly to the left, and inversely arrow
4 to the right indicates a small adjustment to the right is needed. In the example of Figure
3.6
arrow 4 is
pointing to right indicating that the pilot should turn right slightly.
When the course is perfect, i.e. less than 1º o, the LIVE SD indicates this by showing a large arrow
forward (Figure
3.7
).
Figure 3.7: Perfect Heading
Note that, a start is automatically validated when a pilot correctly completes the start. Until the start is
valid the LIVE SD will not advance to the next point in the route. Another important aspect of the start
is that the LIVE SD does not point to the start cylinder but rather to the next turn point on the list. The
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