From Halopedia, the Halo wiki
Hydrocables are a form of human tubing technology.
Hydrocables seem to be used to draw large amounts of water from underground stores. They appear to be used in situations where water is scarce.
During the Voice of Maardoth invasion of Suraka, the Surakan Militia Volunteers used hydrocables to draw water from community wells in order to keep the refugees who had fled to Sector 31 of the city hydrated.
List of appearances
- Halo: Envoy (First mentioned)
- Halo: Envoy, chapter 7