Mark Ellyatt
British technical diver
Mark Ellyatt is a British technical diver and instructor. He teaches technical diving all over the world, including the UK, Egypt, Lebanon and Greece.
World records
Mark Ellyatt held the record for the world's deepest dive reaching 313 m (1,027 ft) in 2003 35 miles off the coast of Phuket, Thailand with a dive lasting seven hours, beating John Bennett's previous 308 m (1,010 ft) record. Ellyatt's dive computer reading from the dive was made available.
In 2003, during a previous extreme deep diving attempt Ellyatt suffered extreme isobaric counterdiffusion (ICD) during decompression, and only survived the dive by virtue of being helped by his support divers. ICD is a common malady in extreme deep diving, and nearly claimed the life of John Bennett in his world record setting deep dive. Don Shirley also suffered extremely serious ICD during the dive which killed Dave Shaw.
HMS Victoria
Ellyatt assisted the local diver Christian Francis in discovering the wreck of the battleship HMS Victoria in 2004, 150m underwater off Tripoli, Lebanon. The wreck sits vertically on its bow, partly buried in the seabed - described as being its 'own underwater tombstone'.
Ocean Gladiator
Mark Ellyat has written about his early diving experiences and later record attempts in his book Ocean Gladiator, published in 2005.
The public source identifies “Mark Ellyatt” as british technical diver. This brief keeps that definition visible, then builds a research path around Mark, Ellyatt and British.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Mark Ellyatt”, the useful work is to connect “british technical diver” to the records capable of establishing context and consequence.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jun 18, 2023. The linked authority identifier is Q6767517. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2003, 2004 and 2005.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Mark Ellyatt”, its source revision and the description used here.
- Expand the search: follow Mark Ellyatt primary sources, Mark Ellyatt archive and Mark research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Mark Ellyatt”?
- Which institution is responsible for the underlying evidence?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Mark Ellyatt” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.