[1] After service as an enlistment officer, and on various ships, he became adjutant to the Governor-General of the Danish West Indies possessions in 1840, as well as the harbor master at St. Croix and military secretary at the General Government.

[3] It was under Peter von Scholten, where van Dockum proved to be a capable and tactful negotiator, during a dispute with the government of the island of Puerto Rico, which he got settled in a way that satisfied both parties.

[2] During the First Schleswig War, in 1848, van Dockum led the corvette Flora on a blockade in the Baltic Sea, but was recalled to participate in the Danish Constituent Assembly as a member appointed by the king.

[2] He settled in Strandgade Helsingør and in 1888, published a book entitled Gamle Minder fra Tjenesteaarene om Bord i franske Skibe 1823-29, Ernst Bojesens Forlag København written down in 1877 by C. van Dockum.

Camradt in June 1833 in family ownership, a Portrait of Frederik Christian Lund's painting Paa Søen 1853 on board "Dannebrog" ( lithograph hereafter) and woodcut drawings by Henrik Olrik in 1864, 1871, and 1893.