In the second recording, a phone call between Air Traffic Control tower at Tucson International Airport and the TPD helicopter crew recorded the day after the encounter, the helicopter crewman notes that the drone maintained a speed of 75 knots in a 30-knot headwind. “So you think it was a drone?” the Tucson tower employee asks during the call. “Yeah was definitely a drone,” the TPD helicopter crew member replies. “I just couldn’t tell you – I couldn’t give you its dimensions as it was moving… too sketchy for us to… I assure you it was not a quadcopter, and it was the most advanced drone we’ve dealt with over the last decade here. Its abilities were pretty incredible, um, I just – I can’t tell you exactly its size.”

The Tucson tower employee then asks if it could have been a larger UAV like an MQ-1 Predator. “It’s not aircraft-sized,” the TPD helicopter crew member replied. “From what I can tell just from its position light, you know, I would have…

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Source: www.thedrive.com