Copy Photograph: The tilt inclinometer from the Thetis

COPY PHOTOGRAPH: The tilt inclinometer from the Thetis which sank in Liverpool Bay.

Thetis was built by Cammell Laird in Birkenhead, England and launched on 29 June 1938. Thetis left Birkenhead for Liverpool Bay to conduct her final diving trials, accompanied by the tug Grebe Cock. As well as her normal complement of 59 men she was carrying technical observers from Cammell Laird and other naval personnel, a total of 103 men. She sank with the loss of 99 lives. She was salvaged, repaired and recommissioned as HMS Thunderbolt serving in the Atlantic and Mediterranean theatres until she was lost with all hands on 14 March 1943. This makes Thetis one of the few military vessels that have been lost twice with their crews in their service history.

Dim cyfyngiadau/ No Restrictions

Adnau preifat / Private deposit

Os gwelwch yn dda archebwch y dogfenau gan ddefnyddio y rhif cyfeirnod amgen (lle ddarperidd) / Please order documents using the alternative reference number (where provided)

Mae copiau clawr caled o`r catalogau ar gael yn Archifau Ynys Môn ac yn y Gofrestr Cenedlaethol Archifau. Polisi Archifau Ynys Môn yw catalogio yn iaith y ddogfen./Hard copies of the catalogue are available at Archifau Ynys Môn / Anglesey Archives and the National Register of Archives. It is the policy of Archifau Ynys Môn / Anglesey Archives to catalogue in the language of the document.

Cyflwr da /Good condition

Compiled by Amanda Sweet for Archifau Ynys Môn / Anglesey Archives

https://en.wikipedia.org/wiki/HMS_Thetis_(N25)

Mae'r holl gofnodiadau sy'n cydymffurfio â pholisi casglu Swyddfa Gofnodi Cyngor Sir Ynys Môn wedi eu cadw /All records which meet the collection policy of the Anglesey Archives have been retained.

Ni ddisgwylir croniadau/Accruals are not expected