Seraya, Indonesia

Seraya, Indonesia: Submarine Cable Landing Point

Seraya is a location on the Seraya peninsula in eastern Bali, Indonesia, forming part of the coastline along the northeast of the island within Karangasem Regency. As a submarine cable landing point, Seraya connects to Indonesia's broader undersea cable network. One submarine cable lands here, the BALOK cable, which links Seraya to another point within Indonesia, making this a domestic connectivity node rather than an international gateway.

The BALOK cable is a short intra-national system, and Seraya's role in Indonesia's submarine cable landscape reflects a pattern seen across the archipelago, where many landing points serve regional or inter-island connectivity rather than intercontinental routes. Indonesia's geography as an archipelago of thousands of islands creates demand for numerous such domestic cable connections, and Seraya represents one node in that wider network.

Cables Landing at Seraya

BALOK is a domestic Indonesian submarine cable with a length of 60 km, reaching ready-for-service status in 2016 as a draft system. Both endpoints of the BALOK cable are located within Indonesia, making it an intra-national link. With a span of only 60 km, BALOK serves as a short-haul connection, typical of systems designed to bridge specific coastal or inter-island distances within the Indonesian archipelago rather than to extend connectivity across international borders.

Regional Context

Within Indonesia's submarine cable infrastructure — which encompasses 70 cables across 139 landing points — Seraya hosts a single cable, placing it in the top 62% of Indonesian landing points by cable count. Major Indonesian hubs such as Batam (20 cables), Jakarta (9 cables), and Tanjung Pakis (9 cables) serve far larger volumes of cable traffic, while Seraya operates as a smaller, more specialised domestic landing point. Its single-cable status is nonetheless consistent with many of Indonesia's 139 landing points, which serve targeted connectivity needs across the archipelago.

Network Role

Seraya functions as a single-cable terminus, anchoring one end of the short domestic BALOK system within the eastern Bali coastal zone. Rather than acting as a multi-cable hub connecting Indonesia to international networks, Seraya enables localised intra-national connectivity over a modest 60 km route between two Indonesian endpoints. This reflects a common pattern across Indonesia's sprawling island geography, where dedicated short-haul cables address specific regional connectivity requirements that longer international systems do not cover directly.

Within the Indonesian submarine cable graph, Seraya's presence as a landing point illustrates how the archipelago's connectivity depends not only on large international hubs like Batam and Jakarta but also on a distributed network of smaller domestic nodes, each serving distinct segments of the country's coastline and island communities.