Vice-Admiral Cecil Vivian Usborne, CB, CMG (17 May 1880 – 31 January 1951) was a high-ranking officer in the British Royal Navy.

[5] In April 1928 he was appointed a Naval aide-de-camp to the King[6] and promoted to rear admiral.

[8] He was brought back into the Navy during the Second World War as Naval Adviser to the First Sea Lord to develop anti-U-boat weapons.

As his assistant he employed Edward Terrell who had developed plastic armour.

[1] After service during the First World War, he was appointed a Commander of the Greek Order of the Redeemer by Alexander, King of the Hellenes in April 1918,[9] a Companion of the Order of St Michael and St George (CMG) by King George V in June 1918,[10] and an Officer of the French Légion d′honneur in May 1919.