Chuck:
If the objective is to be able to have a timer that measures 12 hours, and we are settling for a 30-minute recorder, isn't it really 4.16% of a chronograph (with the 45 minute register getting you to 6.24% and the 60 minute recorder getting you to 8.33% of a chronograph)?
Which reminds me -- What do you think of the Omega Chronostops, which have a one-minute recorder (similar to the usefulness of this Heuer sky-diving timer)?
On some chronos, I think the designer may need to sacrifice a recorder or two to achieve a clean look.
Then again, maybe it goes to the question of whether I am a lawyer, using my 12-hour recorder to record the billable hours in a day at the office, or a sky-diver (or ebay sniper), measuring some shorter event.
Jeff