SeaMeWe-5

SeaMeWe-5: A Major Submarine Cable Connecting Three Continents

SeaMeWe-5 (South-East Asia - Middle East - Western Europe 5) is a submarine cable system spanning approximately 20,000 kilometers and connecting 17 landing points across Europe, the Middle East, and Asia. Operational since 2016, according to GeoCables records, it is listed as in service and is owned by a consortium of 17 operators, including major telecom providers such as China Mobile, Telecom Egypt, and Singtel. The cable plays an important role in facilitating international connectivity along one of the world's busiest data corridors. What stands out about SeaMeWe-5 is the breadth of its geographical reach and the diversity of its ownership. However, several technical details about the cable remain undisclosed in publicly available sources, including its design capacity, number of fiber pairs, and supplier. These gaps leave room for speculation but underscore the proprietary nature of information in the submarine cable industry.

Quick facts

System Name	SeaMeWe-5
Length	20,000 km
Ready-for-Service Year	2016 (GeoCables database)
Owners	Bangladesh Submarine Cable Company Limited (BSCCL), China Mobile, China Telecom, China Unicom, Djibouti Telecom, Myanmar Post and Telecommunication (MPT), Ooredoo, Orange, Singtel, Sparkle, Sri Lanka Telecom, TeleYemen, Telecom Egypt, Telekom Malaysia, Telkom Indonesia, Transworld, center3, du
Status	In service
Design Capacity	Not disclosed
Fiber Pairs	Not disclosed
Supplier	Not disclosed
Technology	Not disclosed

Show SeaMeWe-5 on the interactive cable map

Route

SeaMeWe-5 connects 17 landing points across three continents. These include Abu Talat and Zafarana in Egypt, Al Hudaydah in Yemen, Toulon in France, Marmaris in Turkey, and Catania in Italy in Europe and the Middle East. In Asia, the cable lands at points such as Tuas in Singapore, Dumai and Medan in Indonesia, Kuakata in Bangladesh, and Ngwe Saung in Myanmar. Other landing points include Fujairah in the UAE, Yanbu in Saudi Arabia, Qalhat in Oman, Karachi in Pakistan, Matara in Sri Lanka, and Melaka in Malaysia. This route spans diverse geographical regions, connecting markets with varying levels of demand for international bandwidth. The cable's landing points are also hubs for other submarine cables, ensuring redundancy and alternative routing options.

Why it was built and what it carries

SeaMeWe-5 was constructed to meet the growing demand for high-capacity, low-latency connectivity between Europe, the Middle East, and Asia. This corridor is particularly important for global trade, financial services, and data exchange. The cable serves as a foundation for internet traffic, cloud services, and international telecommunications, linking some of the world's most populous and economically significant regions.

History: what can be established

GeoCables records indicate that SeaMeWe-5 became ready for service in 2016. However, discrepancies in reported dates are not uncommon in the submarine cable industry, as different sources sometimes cite alternative timelines based on specific milestones such as contract signing, cable laying completion, or commercial activation. No conflicting dates are surfaced in this case, but the absence of detailed public documentation makes it challenging to establish a comprehensive timeline.

Capacity and technology

The design capacity of SeaMeWe-5 is not disclosed in publicly available sources, nor is information about its fiber pairs, supplier, or specific technology. Without operator documentation, attributing these details would be speculative. Industry trends suggest that cables of this scale typically employ wavelength-division multiplexing (WDM) technology to maximize capacity, but this cannot be confirmed for SeaMeWe-5.

Latency: the physics

The computed one-way light propagation latency for SeaMeWe-5 is approximately 98.0 ms over its 20,000 km wet segment, with a theoretical round-trip time (RTT) floor of 196.1 ms. Real-world latency measurements, however, are higher due to additional factors such as land-based routing, terminal equipment processing, and network congestion. GeoCables live measurements show RTTs such as Tuas to Toulon averaging 254.1 ms, and Sydney to Toulon averaging 247.4 ms. Some measurements, such as Jerusalem to Al Hudaydah (54.3 ms) and Odessa to Toulon (49.5 ms), fall below the physical latency floor, indicating artifacts from rate-limited ICMP replies or intermediate routing. These values should not be interpreted as the cable's true latency performance.

Redundancy: what happens if it breaks

SeaMeWe-5 is part of a heavily interconnected corridor with numerous alternative cables at its landing points. For example, Abu Talat is shared with systems like Asia Africa Europe-1 (AAE-1) and PEACE Cable, while Fujairah hosts connections to SeaMeWe-4 and IMEWE. This redundancy ensures that traffic can be rerouted in the event of a cable fault. Repairs typically involve specialized cable ships, which locate and fix the damaged segment-a process that can take days to weeks depending on the fault's location and severity.

Bottom line

• SeaMeWe-5 spans 20,000 km and connects 17 landing points across Europe, the Middle East, and Asia.
• Operational since 2016, it is owned by a consortium of 17 operators.
• Key technical details, such as design capacity and fiber pairs, are not publicly disclosed.
• Computed latency suggests a one-way floor of 98.0 ms, but real-world RTTs are higher.
• Redundancy is ensured by alternative cables at its landing points.