Canoe polo (Kayak polo) is one of the competitive disciplines of canoeing:
Philipp Gühring a maker and developer is looking since 6 years for a tracking system
to analyze the games:
A tracking system would need cameras, local memory, accelerometers, gyroscopes, GPS, Wifi and realtime clocks. All this is in a smartphone.
The tracking devices will be on the helmets, in the ball and in the goals.
Also there will be devices mounted on flying helicopters.
The copter.rocks project is already pretty advanced:
One container (>= 1000) of Galaxy Note 7 devices, with or without the batteries would help to realize this project !