Sandgarth, United Kingdom

How the Internet Reaches Sandgarth

Sandgarth is a location in the United Kingdom, positioned within the Northern Isles region of Scotland. As an island community, its international internet connectivity does not arrive via a direct transoceanic link to a foreign country. Instead, Sandgarth is served by a domestic submarine cable that connects it to other points within the United Kingdom, through which onward traffic then flows to the broader global internet.

The single submarine cable landing at Sandgarth is the R100 North cable. This cable ties Sandgarth into a chain of UK landing points, meaning that international traffic — whether destined for North America, continental Europe, or beyond — reaches Sandgarth by first transiting through the UK's wider submarine cable network before arriving at this terminus.

The Cable Serving Sandgarth

The R100 North cable spans 224 km and entered service in 2023. It is an entirely domestic cable, connecting a series of UK landing points: Baile Mòr, Bay of London, Belmont, Burravoe, and Crockness, all within the United Kingdom. The cable does not link the UK to any foreign country; rather, it forms an intra-UK route designed to carry traffic between Scottish island and mainland communities. Sandgarth sits as one terminus along this chain, receiving connectivity that ultimately feeds into the UK's larger international cable infrastructure elsewhere.

Regional Context

The United Kingdom hosts 42 submarine cables across 105 landing points, with an average cable length of 1,451 km and international connections dating back to 1990. Sandgarth represents one of the smaller, domestically focused terminuses within this network. Major UK landing points such as Bude (7 cables), Blackpool (3 cables), and Southport (3 cables) carry the bulk of the country's international submarine traffic. Sandgarth, by contrast, is served exclusively by the R100 North, a short-haul domestic cable rather than a long-distance international link.

What This Means for Connectivity

All submarine-based traffic flowing into and out of Sandgarth passes through the R100 North cable. Because this is the location's only submarine connection, any disruption to the R100 North would directly affect external connectivity for the community. The cable reaches only other UK locations — Baile Mòr, Bay of London, Belmont, Burravoe, and Crockness — meaning that international routing depends entirely on those interconnected points feeding into the UK's broader network of international cables elsewhere.

Understanding Sandgarth's position illustrates how island and remote communities within the UK are integrated into the national internet architecture: not through direct international cables, but through domestic submarine links that bridge geographic gaps before traffic reaches the internationally connected hubs of the wider UK network.