Commander-in-Chief, Western Approaches was the commander of a major operational command of the Royal Navy during World War II. The admiral commanding, and his forces, sometimes informally known as 'Western Approaches Command,' were responsible for the safety of British shipping in the Western Approaches.

Admiral Sir Martin Eric Dunbar-Nasmith, was a Royal Navy officer and a recipient of the Victoria Cross, the highest award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces. He was born Martin Eric Nasmith, adding "Dunbar" to his surname in 1923.