[1] The same year he saw a notice at the college about the relaxation of entry criteria for the Royal Indian Marine.

He completed the course in August 1940 and was appointed an instructor at the ASW training school - HMS Osprey, Portland.

[6] On 1 January 1942, he was appointed the first officer-in-charge of the ASW school in India - at castle barracks.

[8] On 23 October 1944, he was promoted to the acting rank of lieutenant-commander and appointed commanding officer of the Bangor-class minesweeper HMIS Kathiawar (J155).

[9] Kathiawar was a part of the Eastern Fleet, and escorted numerous convoys between Africa, British India and Australia in 1943-45.

He was hand-picked by the Chief of Staff to the Commander-in-Chief, Royal Indian Navy Commodore Martin Henry St. Leger Nott to head the Plans directorate as the Director of Naval Planning at Naval HQ in the rank of Commander.

Among the officers serving under him in the directorate was Lieutenant Commander Nilakanta Krishnan.

[15] In June 1950, he was promoted to the acting rank of Captain and appointed commanding officer of the Delhi.

[3] In November 1950, Chatterji was appointed the Naval Adviser (NA) to the High Commissioner of India to the United Kingdom.

He oversaw the training of hundreds naval cadets and junior officers in the UK.

This made him the fourth Indian naval officer to be promoted to this rank, after Ajitendu Chakraverti, Ram Dass Katari and Bhaskar Sadashiv Soman.

[21] After completing the year-long course, he returned to India and was appointed the Deputy Chief of the Naval Staff on 8 February 1958.

[25] In May 1962, Chatterji took over as the fourth Flag Officer Commanding Indian Fleet.

[31] In January 1964, Chatterji was promoted to the acting rank of Vice Admiral and appointed the second Commandant of the National Defence College.