In 1845, he started to sail on the
Macassar; on board he had to face numerous challenges in the
China Seas: typhoons, storms, grounding.etc. He then sailed for
Batavia. In route for
Singapore in 1847, his ship was attacked by pirates in the
Riau straight. On his way back, it was almost shipwrecked. by
Paul Jean Clays|304x304pxDelcourt, then aboard the
Louise Marie, sailed for the
Rio Nunez, where
Leopold I had created a colony, and arrived there on 10 February 1849. He participated in the
Rio Nuñez incident on 23 March 1849. During his return, his ship silted up, found itself in a bad position and took shots from partisans of Mayoré but was saved by the Africans who stayed loyal to the Belgians. After the successful campaign, Leopold I promoted him to the
rank of
Ensign at sea. He made another trip in 1850 to the
Rio Nunez, but the situation had worsened. He then left for the Belgian colony of
Santo-Thomas, in
Guatemala, which was also collapsing. In 1851, he left once more on board the
Louise-Marie to the Rio Nunez. On the island of
Gorée, the Belgians received a message from the consul of Belgium L. Bols-Wittouck, a cousin of Delcourt, that asked them to get back to Rio-Nunez rapidly, as the situation was worsening. Delcourt was made
lieutenant at sea, 1st class, on 1 July 1863. . In 1865, he was named engineer of maritime constructions, he helped develop the
port of Antwerp. He became the maritime advisor of Leopold II and advised the king on the necessary maritime equipment for Sir
Henry Morton Stanley and
his expedition. , his aunt who raised him after his parents' deaths. |alt= == Legacy ==