Joerg Ewald <<joerg.ewald>>
writes in response to my articles yesterday calling for this exact change:

1. Arrival Time points were introduced for OzGAP in 2005, and that
formula used only Distance, Time and Arrival (Time) points. No Leading points.
The weight distribution was like this:

Distance weight = <complicated formula based on goal ratio>

Arrival weight = (1 – Distance weight) / 4

Time weight = 1 – (Distance weight + Arrival weight)

2. Regular GAP, since 2002, had the following distribution:

Distance weight = <complicated formula based on goal ratio>

Arrival weight = (1 – Distance weight) / 8

Leading weight = Arrival weight * 1.4

Time weight = 1 – (Distance weight + Arrival weight + Leading weight)

3. Now, if you combine the two, to use Leading points and Arrival Time points,
you get:

Distance weight = <complicated formula based on goal ratio>

Arrival weight = (1 – Distance weight) / 4

Leading weight = Arrival weight * 1.4

Time weight = 1 – (Distance weight + Arrival weight + Leading weight)

So in this case both Arrival and Leading weights are doubled compared to regular GAP, taking
away from the Time weight.

I agree that we should change the code so that if both Leading and Arrival Time
points are used, the Arrival weight is always (1 – Distance weight) / 8. This
was how the PWCA used Arrival Time Points in 2009 and 2010, before they
abandoned them completely, as we also did in GAP for paragliding last year. But
that’s a different topic.