Lieutenant commander Lieutenant commander (also hyphenated lieutenant-commander and abbreviated Lt Cdr, LtCdr. or LCDR) is a commissioned officer rank in many navies. The rank is superior to a lieutenant and subordinate to a commander. The corresponding rank i ...

Matthew Robert Todd (3 May 1924 – 29 January 2020) was a submariner who commanded the Royal Navy's

Submarine Escape Training Tank A Submarine Escape Training Tower is a facility used for training submariners in methods of emergency escape from a disabled submarine underwater. It is a deep tank filled with water with at least one underwater entrance at depth simulating an ai ...

from 1964 to 1974 and pioneered the use of new equipment which replaced the old

Davis Submerged Escape Apparatus The Davis Submerged Escape Apparatus (also referred to as DSEA), was an early type of oxygen rebreather invented in 1910 by Sir Robert Davis, head of Siebe Gorman and Co. Ltd., inspired by the earlier Fleuss system, and adopted by the Royal Na ...

to enable escape from much greater depths. His father,

Jack Jack may refer to: Places * Jack, Alabama, US, an unincorporated community * Jack, Missouri, US, an unincorporated community * Jack County, Texas, a county in Texas, USA People and fictional characters * Jack (given name), a male given name, ...

, was the MP for

Berwick-upon-Tweed Berwick-upon-Tweed (), sometimes known as Berwick-on-Tweed or simply Berwick, is a town and civil parish in Northumberland, England, south of the Anglo-Scottish border, and the northernmost town in England. The 2011 United Kingdom census recor ...

. His son,

Mark Mark may refer to: Currency * Bosnia and Herzegovina convertible mark, the currency of Bosnia and Herzegovina * East German mark, the currency of the German Democratic Republic * Estonian mark, the currency of Estonia between 1918 and 1927 * Fi ...

, was the MP for

South Derbyshire South Derbyshire is a local government district in Derbyshire, England. The population of the local authority at the 2011 Census was 94,611. It contains a third of the National Forest, and the council offices are in Swadlincote. The district a ...

References

1924 births Royal Navy personnel of World War II 20th-century Royal Navy personnel 2020 deaths Graduates of Britannia Royal Naval College Members of the Order of the British Empire Royal Navy submarine commanders {{submarine-stub