There are two flight modes.

Firstly, in tethered mode the endurance (or loiter time) is determined by the usage of the camera and servo batteries in the camera pod. On average the airship operates the cameras in hourly cycles; thereafter a quick 5 minute battery changeover is required and the next cycle can begin.

Secondly, in remote controlled mode (untethered) the endurance is limited by the motor batteries to approx 45 minute flight cycles; thereafter, a quick 5 minute recovery and battery changeover is required and the airship can be re-launched - we would normally change the camera batteries at the same time.

As part of the changeover process the data storage media (cards or tape) will also be replaced.