Illiamna, AK, United States

Illiamna, AK: Submarine Cable Landing Point

Illiamna is a landing point located in Alaska, United States, positioned along the state's coastal infrastructure as a terminus for submarine cable connectivity. One submarine cable lands at Illiamna, connecting it to the broader United States domestic cable network. That cable, TERRA SW, links Illiamna to other points within the United States, forming part of a domestic intra-national corridor rather than an intercontinental or transoceanic route.

As a single-cable landing point in Alaska, Illiamna represents a domestic connectivity node serving the region through submarine infrastructure. The TERRA SW cable, which reached ready-for-service status in 2012, provides the sole submarine link terminating at this location, establishing Illiamna as a terminus on a cable system whose endpoints are contained entirely within the United States.

Cables Landing at Illiamna, AK

TERRA SW is the submarine cable landing at Illiamna. It reached ready-for-service status in 2012 and connects landing points within the United States. All endpoints on the TERRA SW cable are located within the United States, making it a domestic submarine cable system. No cable length data is available for this system.

Regional Context

Within the United States submarine cable network, which spans 75 cables across 119 landing points, Illiamna ranks in the top 72 percent of domestic landing points by cable count, hosting one cable. Major United States landing hubs such as Boca Raton, FL and San Juan, PR each host six cables, while Kapolei, HI hosts five, placing Illiamna at the smaller end of the national distribution. Its position in Alaska, however, distinguishes it geographically from the more densely connected landing points concentrated in Florida, Puerto Rico, Hawaii, and California.

Network Role

Illiamna functions as a single-cable terminus on the TERRA SW system, enabling domestic submarine connectivity within the United States from an Alaskan landing site. The cable's entirely domestic endpoint structure indicates that Illiamna's role is oriented toward intra-national connectivity rather than international or intercontinental traffic exchange. This distinguishes it from many other United States landing points that serve as gateways to foreign cable systems.

As one of 119 landing points in the United States submarine cable graph, Illiamna represents the reach of domestic undersea infrastructure into Alaska, extending the national network to a region where overland alternatives may be limited. Its presence in the broader United States cable map illustrates the geographic spread of submarine systems beyond the coasts more commonly associated with international cable landings.