The Calgary Rocketry club hosted the Hanna high-power launch, on April 20, 2024.
I was there to fly my Mega-Initiator rDDT, which is my Mega-Initiator DD modified for redundant dual deployment and fitted with a GPS tracking transmitter.
A redundant DD system uses two altimeters, two batteries, two arming switches, and two pairs of ejection charges. The hope is that if one system fails, the other system will save the day. Although you are only doubling the components in the altimeter bay, it is more than twice as difficult to wire them up correctly. Why bother? It is required in any rocket flown for L4 certification.
A GPS tracker is not required in any rocket, but high-power rockets can go very high and very far, often landing out-of-sight. The GPS tracker helps locate the rocket. Sometimes.
Flying on an Aerotech 54mm J250, my rocket climbed to 3076 ft. The rDD performed perfectly, but the GPS tracker died as soon as I turned my back on it! Luckily, my wife and I had seen where it landed, and we recovered it in perfect condition.