Carrickfergus, United Kingdom

Carrickfergus, United Kingdom: Submarine Cable Landing Point

Carrickfergus is a town in County Antrim, Northern Ireland, situated on the north shore of Belfast Lough, approximately 18 kilometres from Belfast. As a coastal location on the Irish Sea, it forms part of the United Kingdom's distributed submarine cable infrastructure. One submarine cable lands at Carrickfergus, connecting it to the broader network of undersea telecommunications links that serve the country.

The single cable landing here is the Sirius North system, a relatively short cable at 147 kilometres that operates entirely within United Kingdom territory. Given that both endpoints of Sirius North are within the United Kingdom, the cable enables domestic intra-national connectivity rather than intercontinental or inter-country links. This positions Carrickfergus as a domestic corridor landing point, supporting communications within the UK's own coastal and island geography.

Cables Landing at Carrickfergus

Sirius North is a 147-kilometre submarine cable that reached ready-for-service status in 1999, with a draft designation reflecting its operational status at that time. The cable connects points entirely within the United Kingdom, making it an intra-national system rather than an international one. At 147 kilometres, Sirius North is considerably shorter than the average submarine cable landing in the United Kingdom, which stands at approximately 1,451 kilometres. Its relatively compact length is consistent with a route designed to serve connectivity needs within the coastal or inter-island geography of the UK itself.

Regional Context

Within the United Kingdom's submarine cable landscape, Carrickfergus hosts a single cable, placing it in the lower tier of landing points by cable count. The country's 42 submarine cables are distributed across 105 landing points, and Carrickfergus ranks within the top 91 percent of those sites by cable count. Other UK landing points carry significantly more cables: Bude hosts seven, while Blackpool and Southport each host three, and Holyhead, Lowestoft, and Portsmouth each serve two cables.

Network Role

Carrickfergus functions as a single-cable terminus within the United Kingdom's submarine cable network. The Sirius North system it hosts is oriented toward domestic connectivity, linking locations within the UK rather than bridging to foreign territories. This makes Carrickfergus a specialised point in the national submarine cable graph, contributing to intra-UK communications rather than serving as a gateway to international routes.

Within the broader topology of the United Kingdom's 105 submarine cable landing points, Carrickfergus represents one of many distributed sites that collectively provide geographic redundancy and domestic reach. Its presence on the north shore of Belfast Lough extends the UK's undersea cable footprint into Northern Ireland's coastal zone, ensuring that this part of the country participates in the national submarine cable network.