On Tue, 2011-08-23 at 09:59 -0400, Rob Dunning wrote:
> How should we build a task from the Map?
> 
> The mock-up screen below is accessed when you are flying and click on 
> a way point on the map. Only one mouse click is required, and only the 
> valid buttons are displayed:
> 
I find those screens incomprehensible, especially the one that seems to
re-order the turn points.

More seriously, I'm horrified at the thought of building a task while
flying and, in view of recent USAian safety discussions, am very
surprised that a CD should ever be allowed to change tasks once
launching has started. The latest a task can be changed in the UK is
during a re-brief at the front of the grid. Then there's 5-10 minutes
grace time to enter the new task before launching starts.

On the few occasions I've tried recreating a task after I fat-fingered
and messed up the task position I thought I needed to reload and restart
the current task and was surprised and dismayed at the time it took to
reload the task from SD card and then to step forward into the
appropriate leg. Entering all the turn points in the air would be *much*
worse and IMO a total no-no in the usual competition gaggle before the
gate opens.

I personally would not be happy with anything more complex than tapping
a single point on the screen to step round the turn points in the
current task. This is implemented on LK8000 where you tap the top left
corner where the next turnpoint is displayed. This one simple, sometimes
repeated, action is surprisingly flexible. It can:
- cancel an inadvertent start (repeated taps until the start point
  comes round again). I needed this yesterday[1].
- abandon a leg if the next turnpoint isn't reachable (single tap)
- abandon the task (repeated taps until the finish point is shown)
- select the last thermal (appended to the list, so repeated taps
  to select)
- resume the task (repeated taps until the required next turnpoint is
  shown)
- select a land-out field (closest available field is appended to the
  list, so repeated taps to select)

[1] How come? My first leg was directly downwind. The start line was at
the club house, at the upwind end of the field, and the winch was parked
across wind from the club house. Consequently, the action of taking a
launch, checking a cloud a km upwind, finding it wasn't working and then
flying downwind alongside the field to a marked thermal fooled LK8000
into thinking I'd started. After I'd gotten to a suitable start height,
I flew upwind to the next cu that was upwind of the field, topped up
height a little, reset the task to the start point by tapping the spot
to recycle back to the start point, and made my actual start.

Martin




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