Now we are nearing the main summer race season, all remaining races are being run with LiveTime digital timing. It is important you arrive to a race with a working Transponder fitted. There will be an opportunity before racing begins on the day where you pass your boat under the bridge and it will call out your boat number to test. This will be before the bridge is floated out. To test a Transponder beforehand, you can normally shine a camera phone or live camera over the emitter and it will glow white or blue depending on your camera/phone screen. If you find your Transponder is not showing up, you might need to replace the emitter. Most will work, but you need a clear emitter with a max wavelength of 860nm or more. The longer leg on the emitter is the positive. You can buy a pack very cheaply from places like Amazon. BUY EMITTERS FROM AMAZON