Regional Cabled Array South Line Outage

On 17 August 2020, at ~1824 hours PDT, the south cable line went offline due to an over-current event. Investigations into the source of the outage were initiated immediately. Following initial tests, on 20 August 2020, at ~1200 hours PDT, power was restored to Primary Node PN1A - the Slope Base site and all infrastructure at Slope Base is now operational, including the shallow and deep profilers.

On 25 August 2020, beginning ~ 0900 hours PDT, an ~ 1 day test of the south cable line began to help refine the fault localization. This required stopping data collection for the duration of the test at the Slope Base site. Data collection began again as soon as this test was completed.

Based on testing, troubleshooting, and a survey of the site, the entire south cable line will not be able to be restored past the Slope Base (PN1A) site without a system repair. As of 16 November 2020, a draft scope of work to repair PN1B is in development.