Scanning the radio frequency band from 50KHz-2GHz for what purpose?

3 – 30MHz
Military and Gns / Amateur radio / Shortwave International and Regional Broadcasting / Maritime Sea-to-shore and Ship-to-ship Services / Over-the-horizon Radar Systems / Global Maritime Distress and Safety System (GMDSS) Communication / Citizen’s Band Radio Services Worldwide

30 – 300MHz
Digital Audio Broadcasting (DAB) / FM radio broadcasting / Television Broadcasting / Two-Way Land Mobile RadioSystems (emergency, business, private use and military) / Long Range Data Communication up to several tens of kilometers with radio modems / Air Traffic Control

300MHz – 3GHz
Television Broadcasting / Cell Phones / Satellite Communication / GPS / Personal Radio Services / Wi-Fi / Bluetooth / Walkie-Talkies / Cordless Phones

Radio was heard before it was invented. It was heard before anyone knew it existed.
It was heard in the first wireless technology: the telephone. The telephone served two major purposes: it was a scientific instrument used to investigate environmental energy, and it was an aesthetic device used to experience the sounds of nature. […] The first person to listen to radio was Thomas Watson, Alexander Graham Bell’s assistant. He tuned in during the early hours of the night on a long metal line serving as an antenna before antennas were invented. Other telephone users listened to radio for two decades before Guglielmo Marconi or anyone else invented it. Some heard music and others heard sounds that were out of this world. As time passed, radio fled into the wilderness, a place where nature once existed, and was forced from technology, a place where nature could not be found. […]

If the story told in the previous paragraph seems unnatural, it is because the radio is natural. Radio is not always a technological control device supplied with energy from a battery or a plug in the wall; sometimes it is the energy. Unlike other forms of nineteenth-century media that developed upon a tried-and-true base of writing and storage, the sphere of telecommunications technologies of telegraphy, telephony, and wireless resonated with energetic environments and received signals from terrestrial and extraterrestrial sources. Thus, receiving radio may mean that someone is listening but not always that anyone is sending. (Douglas Kahn from Earth Sound Earth Signal)

What is resonating with your antenna, your circuit, your mindset when you scan through the radio band of the Montevideo bay? Which signals are natural?
What is filling the aether and for what reason and purpose? How does this is mirroring the physical environment and where does it collide with the dissolving and blurring of the edges. Can you tune in an environment? Sensing between material and no-material states? What seems to make sense?

Like the fisherman fishing in the highly contaminated bay of Montevideo, maybe not to eat the fish, but to connect to the sea, to another?

During our long walks in the Montevideo bay we scanned the frequency band systematically with a portable SDR device using found infrastructures like fences, grids, towers and other metal constructions as antennas and a long copper pole as grounding earth. The results varied according to altitude, antenna, weather and day-time of course but also according to subjective attention catalyzed by the actual location. Some where obvious and expected signals, some surprising (like the numbers station). But the space seemed always to extended in to the invisible environment. Placing the initial frequency like the first throw out of the fishing rod – slowly dialing up the band like hauling in the line. Tuning the reel and the bandpass filters…
Waiting. Observing.