[Martin does, eventually, answer. He sounds collected in a way he hadn't yesterday, no nerves, just forced calm and a very quiet voice as he whispers into the radio.]

I'm here. In a cell about as long as I am tall. Around 6 feet. I see the drones that took me, or ones like it. There are two on a set of three pads. Think the third one's out on patrol. Find good cover if you hear the humming, they're too fast to outrun when they spot you.