Dhowan graduated from the National Defence Academy (45th Course, Charlie squadron) on 1 January 1975. He was honoured with a "telescope" for being the "Best Cadet", and was later awarded the 'Sword of Honour' on completion of his midshipman training.[4] He was commissioned an acting sub-lieutenant on 3 May 1975.[5]
He is a "Navigation and Direction" specialist, and during his career he has commanded the missile corvette INS Khukri, and guided missile destroyers INS Ranjit and INS Delhi.
From 2002 to 2005, he was the Naval Adviser at the Indian High Commission at London.
Flag rank
After his elevation to flag rank, he served in various staff and instructional assignments. He was the Assistant Chief of Naval Staff (Policy and Plans) (ACNS P&P) in the Integrated Headquarters (Navy) and then commanded the Eastern Fleet.