In 1829 Verninac took command of the corvette ''
L'Astrolabe'', with which
Jules Dumont d'Urville had made his first voyage around the world. He went to
Alexandria to pick up the mission led by
Jean-François Champollion, which had completed three years of exploration and studies in the Nile Valley. He took them back to
Toulon, and made friends with Champollion on the voyage. He then participated in the
Invasion of Algiers in 1830. He was promoted to Lieutenant Commander (
Capitaine de corvette) in 1833. tows the barge
Luxor carrying the Luxor Obelisk to France
Muhammad Ali, effective ruler of Egypt, made a gift to France of an
obelisk at Luxor weighing 230 tons, which had to be transported from
Luxor back to France. Verninac was given command of the expedition on Champollion's recommendation. With the help of the naval engineer Apollinaire Lebas, Verninac developed the idea of cutting a flat-bottomed barge in half across its center, installing the obelisk, then rebuilding the barge so it could be towed down the Nile and on to France. The steam corvette
Le Sphinx, a three-masted schooner that was the first steam vessel of the
French Navy, was used to tow the specially built
Le Luxor barge, which carried the obelisk from
Thebes to Paris. Verninac published an account of the voyage in 1834,
Le voyage du Luxor en Égypte. The obelisk remained on the quay of the
Seine for two years before being erected in the
Place de la Concorde on 25 October 1836. Verninac was promoted to Commander. In 1838 he was made director of the steam packet boats carrying mail in the Mediterranean. He was promoted to Captain in 1842. Verninac was appointed a member of a commission to organize and arm steam boats. He was one of the first captains to enter the Admiralty council in 1848. He was always interested in new ideas, and was quick to recognize the revolutionary impact of steam on naval warfare. ==Political career==