In July 1779 he became commander, and was appointed to the "Rover" sloop; in June of the following year he attained the rank of post-captain.
Erichsen's lost diaries a small expedition in the sloop " Alabama " went to East Greenland in 1909.
With the help of a strong detachment of officers and men from the Atlantic coast he equipped a squadron consisting of one brig, six fine schooners and one sloop. Other vessels were laid down at Presque Isle (now Erie), where he concentrated the Lake Erie fleet in July.
In 1831 he was appointed master of the sloop "Falmouth" on the Pacific station, and subsequently served in other vessels before returning home in 1834, when he married his cousin, Ann Herndon.
In 1833 he was appointed teacher of mathematics on board the sloop of war "Natchez," and was so engaged during a cruise along the South American coast which was continued for about two and a half years.