Shipwreck Identified on Celtic Sea Floor
Researcher Silaz McCormick has identified a 1940 shipwreck using automated sonar matching tools.
Updated on Oct. 13, 2026 in Geography
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Silaz McCormick identified a 147.5-meter wreck 340 kilometers off Land's End as the Sultan Star. The site, cataloged as GSI 527, sits at a depth of 161 meters.
Why it matters
The identification demonstrates the utility of automated matching algorithms in historical maritime surveys of the seabed. This approach accelerates the classification of thousands of cataloged sonar targets.
The Wreckhunt program generated a 0.90 identity match score for the 147.5-meter target against historical records. This follows successful blind testing where the system correctly identified 34 of 36 historical vessel records.
The players
Silaz McCormick
Researcher who utilized the Wreckhunt program to correlate sonar data with maritime historical loss records.
INFOMAR
A joint seabed mapping program that executed the multibeam survey of the Celtic Sea shelf in 2021.
The details
The site was identified using data from a 2021 multibeam survey—a method of mapping the seafloor by emitting pulses of sound in a fan shape—conducted by INFOMAR. McCormick utilized the Wreckhunt program to compare the dimensions of the GSI 527 wreck against loss records for vessels sunk within a 200-kilometer radius. The Sultan Star was a 12,306-ton refrigerated liner that sank after a torpedo strike from the U-boat U-48.
Timeline
1930: The Sultan Star was built at Birkenhead.
14 February 1940: The Sultan Star sank after a torpedo strike.
2021: INFOMAR performed a multibeam survey of the Celtic Sea shelf area.
- 2026-10-13
The identification of the wreck was formally published.
The Tech Race
This identification effort follows the data gathering phase established by the INFOMAR mapping project. It marks a transition from collecting vast bathymetric datasets to applying automated identification routines to categorize legacy sonar contacts.
This methodology allows historical researchers to prioritize specific targets for physical inspection rather than surveying wide areas randomly. Future verification of the wreck will require the deployment of a remotely operated vehicle (ROV) or camera system to confirm the identification.
The takeaway
Automated sonar matching significantly reduces the field research time required to correlate seabed anomalies with historical loss records. Interested observers should monitor future site-specific ROV deployments that aim to confirm the identity of GSI 527.
Further reading
Explore how sonar and mapping technologies are changing our understanding of the Geography of the deep sea.
Source note: This article includes information reported by Divernet.
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