He was second in command of the cutter Forsvar on the Norwegian coast, before undertaking a cruise to the Danish West Indies on the frigate Iris.

Müller described the admiral as a small, gaunt man with a strong presence, wearing a green Russian-style (kalmyk) overcoat and a three-cornered hat.

[3] As commander of this Finnmark Squadron in 1810, he re-established Norway's control of the trade route to northern Russia, which British warships had interdicted.

While she was returning to Trondheim with eleven large ships taken as prizes in September, Lougen ran aground on a reef south of Bodø and was nearly lost.

When he returned to duty he was responsible in August 1813 for successfully escorting a regiment of soldiers over the Great Belt to the island of Langeland despite the British blockade.

One year after the Treaty of Kiel and the short war with Sweden, Müller sought release from his duties to the Danish King Frederick VI, who was loath to lose such an effective officer.