Researchers Capture First Images of Ituna Shipwreck
The 1920 steam yacht was documented using submersibles within the Greater Farallones National Marine Sanctuary.
Updated on Oct. 15, 2026 in Environmental
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Researchers have captured the first underwater images of the Ituna, a steam yacht that sank off the coast of San Francisco in 1920. The documentation was completed using a remotely operated vehicle and an autonomous underwater vehicle within the Greater Farallones National Marine Sanctuary.
Why it matters
Mapping and examining shipwrecks like the Ituna serves to preserve maritime history and document the ecological state of artifacts on the seafloor. This effort is part of a broader study aiming to catalog the estimated 400 wrecks within the sanctuary.
Researchers utilized an autonomous underwater vehicle — a robotic submersible capable of independent navigation — alongside a remotely operated vehicle to collect high-definition video and sonar data from the site.
The players
Maritime Heritage Program
A federal initiative focused on the survey, identification, and preservation of submerged historical resources.
Greater Farallones National Marine Sanctuary
A federally protected marine area off the California coast containing an estimated 400 shipwreck and aircraft sites.
The details
The Ituna was a 34-year-old luxury steam yacht when it sank in 1920, disappearing bow-first in only 10 minutes after heavy seas caused its seams to split and its forward hold to flood. Today, the wreck sits within the Greater Farallones National Marine Sanctuary, where it has been colonized by marine life including giant green anemones and white plumose anemones. High-definition imagery and sonar data are now being used to create a detailed map of the structure.
Timeline
1886: The Ituna was built as a luxury steam yacht in Glasgow, Scotland.
13 March 1920: The vessel sank north of the San Francisco Lightship station.
1918: The Ituna introduced otter trawl fishing to the coast.
2026-2028: The Maritime Heritage Program is conducting a two-year study to document local shipwrecks.
The Tech Race
The documentation of the Ituna marks a milestone in the Maritime Heritage Program's two-year study, which aims to plot 20 specific vessels within the sanctuary. This initiative aligns with wider efforts to systematically catalog the 400 known wreck sites littering the sanctuary seafloor.
This project provides the public with visual data and historical context regarding local maritime history within protected waters. Future updates from the two-year study will further characterize the condition of these submerged sites for researchers and coastal enthusiasts.
The takeaway
The successful imaging of the Ituna provides a clearer understanding of how these vessels transform into artificial reefs over time. Researchers will continue to monitor the site throughout the two-year study, which remains the primary benchmark for maritime heritage documentation in the region.
Further reading
Learn more about local preservation efforts in the Environmental section.
Source note: This article includes information reported by The Times of India.
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