OOI’s infrastructure consists of fixed and mobile platforms outfitted with scientific instrumentation and nodes that provide power and connectivity. This complex formation provides a continuous stream of ocean data, in spite of operating in a challenging open ocean environment.
We report here on incidents that are currently affecting OOI’s infrastructure, including timelines for resolution. Most incidents are only temporary in nature, awaiting resolution for the next scheduled operations and management cruise.
UPDATED 2021-07-19: The Washington offshore surface mooring is seeing intermittent power transmission issues to the multifunction node (MFN) at the bottom. We anticipate six of the nine sensors will continue recording internally and that their data will be recovered in September. Real time data from seafloor instruments at this site will resume in September 2021 when the mooring will be replaced on the regularly scheduled maintenance cruise.
UPDATED 2021-07-19: Pioneer Profiler Mooring Upstream Inshore (PMUI) appears to be fouled and is caught at a 50m water depth. PMUI will continue to collect data but will be static at 50m unless fouling clears.
UPDATED 2021-03-29: On 29 March 2021, communications from all instruments mounted on the Washington shelf mooring seafloor multifunction node stopped. We anticipate six of the nine sensors will continue recording internally and that their data will be recovered in September. Real time data from seafloor instruments at this site will again be available in September 2021 when the mooring will be replaced on the regularly scheduled maintenance cruise.
UPDATED 2021-07-13:The number of gliders deployed on the Endurance Array generally does not meet the intended baseline sampling of six gliders in the water. This is an ongoing issue due to a combination of extended glider maintenance cycles and weather curtailment of small ship operations. Gliders are prioritized on the Grays Harbor and Newport glider lines.
UPDATED 2021-07-12: Pioneer Offshore Surface Mooring Multi-Function Node (OSSM MFN) is inoperable (no communications or power) following deployment in April 2021. Instruments are continuing to collect data operating on batteries and data will be downloaded upon recovery during the Fall Pioneer cruise In October.
UPDATED 2021-07-12: Pioneer Profiler Mooring Central Offshore (PMCO) has been experiencing satellite telemetry issues since April. The Profiler will continue to operate and data will be downloaded upon recovery during the Fall Pioneer cruise in October.
UPDATED 2020-11-16: 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 22 August 2020, an inspection of ~10 km of the primary cable between Primary Nodes PN1B (~ 10 km south of Southern Hydrate Ridge) and PN1A was conducted to search for potential external aggression. The inspection identified no indications of external aggression.
On 25 August 2020, beginning ~ 0900 hours PDT, a ~ 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 will begin again as soon as this test is 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.