GPS week rollover issue

At 17:14 10 February 2019, Martin Gregorie wrote:
On Sun, 10 Feb 2019 09:32:19 -0700, Dan Marotta wrote:

This raises a question with me.Â* I've often heard that Cambridge
started
the whole GPS flight logging thing.Â* If that is true, why did FAI come
up with a different file structure?Â* If it is true, why not simply use
the Cambridge file?Â* Is it not "secure" enough?

Bob Fletcher (General Manager of Cambridge Aero Instrument) and Hans
Trautenberg came up with it in 1993-4.


Did the Cambridge file include baro height as well as GPS?
What about the task, pilot, glider and other stuff in the header, i.e.
A,C and H records?

Of course.

FWIW, now that the use of finish rings and variable barrel size
turnpoints is becoming common in some countries the IGC 'C' records
(which list the start and end of a task as well as the turnpoints) really

need extending to allow the logger to record the type and size of all the

items that define a task, especially where variable barren sizes are used

in a handicapped event.


No, not really. The C-records are for defining Tasks in accordance with The
Sporting Code, which defines barrel radii and are not variable.