Which beacons i should buy?

I want to track position of swimmers in a swimming pool.Will proximity beacons do the job?Or do i need to buy location beacons

@hansani, you can also buy Estimote Stickers. they’re splash proof and dustproof . Keep in mind, though, that they’re not 100% waterproof and we don’t recommend exposing them to the heavy rain or other extreme conditions. If water gets under the adhesive backing, it can destroy the PCB of a beacon, effectively bricking the device.