The marathon is using a RFID tag on each runner's shoe.
From the Chronotrack web page:
ChronoTrack has developed the disposable “D” Tag, an all-weather design for attaching an EPCglobal-certified, commercially available RFID tag to the foot. ChronoTrack, in concert with its strategic partner, Impinj, Inc., has designed custom UHF RFID controllers and antennas that specifically read “D” Tags in a racing environment.The benefits seem reasonable to me:
Disposable TagIt does seems like a strong challenger to the ChampionChip system. With large, big name marathons like the Marine Corps Marathon signing up it will be interesting to watch who wins :-)
No Fees for lost or not returned tags
Less hassle post race
Lighter, Less intrusive tag
Easier to attach to shoe
No pre-race check-in
No post-race tag turn-in
I will report back after the race with how it works for me.
One thing I do know is that competition is generally good for new innovations....so the runners win either way.