Chagos as a broadcast hub to reach 40% of the world's population...
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https://poelposition.blogspot.com/2026/02/chagos-as-broadcast-hub-for-40-of.html
V0.11 20Feb26
A new GB World Service broadcast system reaching 3-5 billion listeners will provide outlets for UK creative content and advertising.
If we were to deploy high-power (100kW+) transmitters with directional "curtain" antennas, the potential audience is staggering. Shortwave is a "wide-area" broadcast technology where one point of transmission can connect to any number of receivers with range; from Chagos, you are within 3,000 to 5,000 km of nearly 40% of the world's population.
Calculating the "cost per listener" for a shortwave station in the Chagos Islands involves a massive economy of scale. Because shortwave is a "one-to-many" broadcast medium, your cost per listener drops precipitously as your audience grows, eventually reaching fractions of a cent.
The Chagos Islands (specifically Diego Garcia) represent one of the most strategically significant locations on Earth for shortwave broadcasting. From a technical perspective, their effectiveness for a Digital Radio Mondiale (DRM.org) base is exceptionally high due to their "hub" position in the centre of the Indian Ocean.
Technical Effectiveness: The "Hub" Advantage
Shortwave signals rely on ionospheric reflection (skywave propagation) to travel thousands of kilometers. Because the Chagos Archipelago is surrounded by thousands of miles of open ocean, a high-power DRM transmitter there has a "clear shot" to major landmasses in every direction.
DRM Advantages: Unlike traditional AM shortwave, which suffers from "fading" and "static," DRM delivers near-FM quality sound and can include data (scrolling news, emergency alerts).
Propagation: The tropical location is ideal for reaching the "Global South." Signals from Chagos can reach East Africa, the Middle East, South Asia, and Southeast Asia with just a single "hop" of the signal off the ionosphere.
The AI that wrote this brief made a massively spurious point about Low Interference:
"Being thousands of kilometers from major industrial cities, the local "noise floor" (electromagnetic interference) is extremely low, allowing for cleaner transmission and more efficient use of power."
Although that's not an issue for the transmission end as it only matters at reception locations - it serves as a reminder of AI's ability to seem authoritative when getting really big issues wrong - which means informed human oversight is still required and will be for a long time to come.Strategically, Radio is going to go above and around most of the internet censorship that crucially identifies the listeners via their IP connection
1. The Initial Investment (Capex)
A high-power DRM facility in a remote location like Chagos requires significant upfront capital But since the UK was contemplating spaffing £30m on surrendering the islands to China via Mauritius, this is chicken feed.
Transmitter (250kW DRM-capable):
Approximately $1.5M – $2.5M. Antenna System (Curtain Array): A high-gain directional array for targeting India or Africa costs roughly $1M.
Site Infrastructure: In Chagos, you would need dedicated power generation (likely solar with diesel backup) and hardened housing for the tropical environment, adding another $2M–$4M.
Total Capex: ~$5M – $8M.
2. Operational Costs (Opex)
The primary recurring cost for shortwave is electricity.
Energy Efficiency: A major advantage of DRM is that it requires about 40–60% less power than analog AM to achieve the same coverage.
Hourly Rate: To run a 250kW transmitter (drawing ~350-400kW from the grid) costs roughly $80–$150 per hour in electricity and maintenance, depending on local fuel/energy prices.
Yearly Opex: If broadcasting 18 hours a day, your annual operating cost is roughly $1M.
3. The "Cost Per Listener" Calculation
This is where the Chagos location becomes highly "profitable" in terms of influence.
Audience Size Annual Opex Cost per Listener / Year 100,000 (Niche) $1,000,000 $10.00 1,000,000 (Regional) $1,000,000 $1.00 10,000,000 (Sub-continent) $1,000,000 $0.10 (10 cents) 100,000,000 (Mass Market) $1,000,000 $0.01 (1 cent) Summary of Effectiveness
Targeting India: Since there are already over 13 million DRM-enabled cars in India as of late 2025/early 2026, a signal from Chagos reaching just 10% of that automotive market would result in a cost of roughly $0.75 per listener per year.
Compared to Satellite/Internet: Unlike satellite (which requires a subscription/dish) or Internet (which requires data plans and can be censored), the cost to the listener is zero after the initial radio purchase. For the broadcaster, the cost per listener in a high-density region like South Asia is significantly lower than any other terrestrial medium.
The Verdict: Chagos is arguably the most cost-effective site in the world for reaching the "Global South" because a single transmitter can cover billions of people for the price of a small-town FM station's power bill.
Footnote: Power requirement
Estimated Cost of Power Infrastructure
Component Estimated Cost (USD) 2.8 MW Solar Array (Installed) $2,800,000 7.6 MWh Battery Storage (BESS) $2,300,000 Power Electronics (Inverters/Microgrid Controller) $500,000 Total Energy Capex **~$5.6 Million**
