Since V6 there has been many changes to the AAT tasks in XCSoar and it is at
a point now where it is a quite difficult to use it for AAT and particularly
multi startpoints AAT.
I'd like to share some behaviours of the current version 6.3.8 so perhaps
people can express their wishes of how it should work and the developers can
look into it.
I understand that multi starts AAT are not used everywhere but here in
Australia, unless it is a GP, in any given comp you will get an AAT day and
most of the time it is with multiple starts.
1) We no longer can Arm the start, the task is armed from the beginning
of the flight. This particularly annoying when waiting for the gate to open
and fly in and out of the start sector, the task keeps starting and
re-starting.
2) If we select a SP via Next Startpoint button and enter another SP
sector, then the target becomes the SP we just entered rather than the one
we selected.
Here is a case where it is a real pain
We are in a comp and we are assigned 3 different SP SP1, SP2 and SP3.
Based on the wind and location we decide to start on SP1.
We select SP1 using "Next Starpoint" button.
While waiting for the start gate to be open then a cloud pops on SP2 and we
decide to go there.
When entering the SP2 sector the target start changes to SP2 which we do not
want.
When leaving SP2 to go to SP1 the task starts and the target become TP1.
We then need to select previous TP in XCSoar and cycle trough the SP till we
have SP1 as target again.
3) There is no notification where we enter the starting sector.
Obviously this makes us having to look at XCSoar more than desirable at a
busy time when flying in close company of many other gliders.
4) If we fly through another SP after starting the task the task
re-starts. Depending on our intention we should be able to prevent that
behaviour.
5) The optimisation is not very flexible, either it picks the point for
you which is generally not appropriate for an AAT or you pick the point and
you have to time your turn ie what is XCSoar supposed to do for you. What
would be nice is if we can give directions to XCSoar and it make picks the
point for us, as an example give a heading and XCSoar adjusts how far to go
in that heading.
6) In my experience the calculations for time are always extremely
pessimistic, if I make my turn for and arrival at +5 minutes, I will
invariably be early.
7) When changing the diameter of the start point after alternates have
been defined, the alternates do not change and the only way to change them
is to delete them and re-create.
It would be good if we can have feedback from other pilots about how they
think XCSoar should behave for AAT multi starts
Cheers
Jax
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