Uganda is a landlocked country, hundreds of kilometres from the nearest ocean. Yet when you send a WhatsApp message from Kampala to a friend in London, or watch a YouTube video hosted in Europe, your data almost certainly travels through cables lying on the bottom of the Indian Ocean. Understanding how undersea cables connect Uganda to the internet helps explain why our internet sometimes slows down, why prices have changed over the years, and why where a website is hosted matters.
What are undersea cables?
Undersea cables, also called submarine cables, are fibre optic cables laid across the sea floor to connect continents and countries. Inside each cable are hair thin strands of glass that carry data as pulses of light. They are protected by layers of plastic, steel wire and, near the shore, extra armour to resist anchors and fishing equipment.
These cables carry the vast majority of international internet traffic in the world. Satellites play a role too, especially in remote areas, but cables can carry far more data at lower delay, which is why they form the backbone of the global internet.
How the internet reaches a landlocked country
Since Uganda has no coast, our connection to undersea cables happens in stages. Think of it as a journey with several legs.
Leg 1: Across the ocean to East Africa
Several international cable systems run along the East African coast and link the region to the Middle East, Europe, Asia and southern Africa. Well known systems such as SEACOM, EASSy and TEAMS land on the coast, and newer cables have been added over time. They come ashore at cable landing stations in coastal cities, mainly Mombasa in Kenya and Dar es Salaam in Tanzania.
Leg 2: Overland fibre to the Ugandan border
From the landing stations, data travels inland along terrestrial fibre optic cables, often laid beside roads, railways and power lines. Routes run through Kenya towards Busia and Malaba, and through Tanzania towards Mutukula. Having more than one route means that if one is damaged, traffic can be shifted to another.
Leg 3: Across Uganda
Inside Uganda, a network of fibre carries data to towns and cities. This includes the government's National Backbone Infrastructure, managed by NITA-U, as well as fibre owned by telecom operators and internet service providers. These networks connect to exchange points and data centres, mostly in and around Kampala.
Leg 4: The last mile to you
Finally, your internet provider delivers the connection to your phone, MiFi, home router or office. This last mile might be 4G or 5G from MTN or Airtel, fibre to your building, or a wireless link from a local ISP.
Following one request from start to finish
Here is what happens, in simplified form, when you open a news website hosted in Europe from a café in Ntinda:
- Your phone sends the request over Wi-Fi to the café's router.
- The router passes it to the ISP's network in Kampala.
- The ISP sends it along fibre to the Kenyan or Tanzanian border.
- It travels across the neighbouring country to a coastal landing station.
- It enters an undersea cable and crosses the ocean, possibly via several countries.
- It reaches the data centre hosting the website, which sends the page back the same way.
All of this happens in a fraction of a second, but every leg adds a little delay, known as latency.
Why this matters for your internet speed
Distance adds delay
Light in fibre is fast, but crossing thousands of kilometres still takes time. That is why a website hosted in Europe or the United States usually responds a little slower from Uganda than one hosted closer to home. For video calls and online gaming, this delay is easy to notice.
Cable faults cause slowdowns
Undersea cables are sometimes damaged by ship anchors, underwater landslides or earthquakes. When a major cable is cut, traffic is rerouted onto other cables, which can become congested. Past cable faults along the African coast have slowed internet across several countries for days or weeks while repair ships carried out fixes.
Overland routes matter too
Roadworks, vandalism or power problems on the land routes through Kenya and Tanzania can also disrupt service. Providers that buy capacity on multiple routes are more resilient.
Capacity affects price
Before the major undersea cables reached East Africa, much of the region relied on expensive satellite links. The arrival of cable capacity made faster and cheaper internet possible, although many other costs, such as taxes, spectrum and the last mile network, still affect what you pay for data.
What this means for Ugandan websites and businesses
- Hosting location affects speed. If most of your visitors are in Uganda, hosting with good connectivity to the region can make your website feel faster.
- Content delivery networks help. A CDN stores copies of your site's images and files in many locations, so visitors download them from somewhere nearby.
- Backups and redundancy are wise. If international links slow down, cloud tools hosted far away may become frustrating. Keep important files available offline as well.
- Light websites win. Compressed images and lean pages load faster on every connection, whatever the cable situation.
At Baasa Cloud we use LiteSpeed servers and caching to keep websites quick for Ugandan visitors, and we are happy to explain hosting location options if speed matters for your business.
Common myths about undersea cables
- "The internet comes from satellites." Satellites help in some places, but most international traffic travels through cables.
- "Sharks keep biting the cables." Shark bites have been reported in the past, but modern cables are well protected and most damage comes from human activity and natural events.
- "A single cut takes Uganda offline." Usually not. Traffic is rerouted, though speeds may drop.
Frequently asked questions
Does Uganda have its own undersea cable?
No, because it has no coastline. It connects to undersea cables through fibre routes across neighbouring countries, mainly Kenya and Tanzania.
Why does my internet slow down even when my bundle is fine?
Possible reasons include network congestion in your area, problems on international routes, a busy website server far away or interference with your Wi-Fi. A cable fault is only one of many possibilities.
Is satellite internet a good alternative?
Satellite internet can be useful in rural areas without fibre or strong mobile coverage. Check availability, equipment costs and whether the service is licensed by UCC before buying.
Conclusion
Every time you go online in Uganda, your data likely takes a long trip: over local fibre to the border, across a neighbouring country to the coast, and then along the ocean floor to the rest of the world. Knowing this journey helps you understand slowdowns, make smarter choices about hosting and appreciate the remarkable engineering behind a simple WhatsApp message.