Every time we deploy a Crittercam, we're basically throwing thousands of dollars' worth of equipment into the ocean or the outback. In addition, marine Crittercams record all data onboard, so if we don't get the systems back, we don't get the video, the soundnothing.
For marine animals, we can release Crittercam systems remotely by programming a computer inside the system to trigger the release mechanism at a certain time. The Crittercam then floats to the surface, where we can track and recover it using its onboard radio beacon.
For land animals, at any time we can send a signal that causes the Crittercam collar to detach from the animal.
To find Crittercams after they're released from animals, we use homing devices like ultrasonic signalers and radio transmitters, which enable us to track the systems.