Groote Eylandt

Overview

The Groote Eylandt submarine cable is a regional telecommunications system connecting two locations in the Northern Territory of Australia: Alyangula, situated on Groote Eylandt, and Numbulwar, located on the mainland. Spanning 95 kilometers, the cable was commissioned and became operational in 2011. Owned and operated by Telstra, this infrastructure provides a vital link for communication services in a remote area characterized by isolated communities and challenging geography. The cable supports essential connectivity for residents, businesses, and government operations in the region.

Route and Landings

The Groote Eylandt cable begins at Alyangula, a township on Groote Eylandt, which is the largest island in the Gulf of Carpentaria. Groote Eylandt is known for its manganese mining operations and indigenous communities. The cable crosses the shallow waters of the Gulf of Carpentaria to reach its second landing point at Numbulwar, a small coastal community on the mainland of the Northern Territory. Numbulwar is home to indigenous populations and serves as a hub for regional services and activities.

The Gulf of Carpentaria is a relatively enclosed sea bordered by northern Australia and the Cape York Peninsula. Its shallow depth and calm conditions make it suitable for laying submarine cables. The Groote Eylandt cable facilitates intra-regional communication, connecting two remote locations that otherwise face significant geographic barriers to terrestrial connectivity. This infrastructure helps bridge the gap between communities separated by water and distance.

Ownership and History

The Groote Eylandt submarine cable is owned and operated by Telstra, one of Australia’s leading telecommunications companies. Telstra has a long history of providing connectivity solutions across both urban and rural areas of the country. The cable was completed and made ready for service in 2011, marking a significant step in improving telecommunications infrastructure in the Northern Territory.

While specific details about upgrades or maintenance since its commissioning are not publicly available, the cable continues to play an important role in linking Alyangula and Numbulwar. The investment in this infrastructure reflects Telstra’s commitment to extending reliable communication services to remote and underserved regions of Australia. The cable’s presence supports the economic activities and social needs of the communities it serves, including mining operations, indigenous populations, and local businesses.

What Our Measurements Show

Our live monitoring of the Groote Eylandt cable has recorded data from 594 measured corridors. The best round-trip time (RTT) observed is 102 milliseconds, while the average RTT across all measurements is 143 milliseconds. These figures indicate a reliable performance for a regional cable system operating in a remote area. The latency is consistent with the cable’s relatively short length of 95 kilometers and its role in providing local connectivity.

The cable’s performance ensures adequate support for essential services such as internet access, voice communication, and data transfer. By facilitating reliable connectivity, the Groote Eylandt cable helps overcome the challenges posed by the Northern Territory’s vast distances and sparse population density. This infrastructure is critical for enabling communication in a region where terrestrial networks are often impractical due to geographic and environmental constraints.