Barent Martenszoon served the Admiralty of Zeeland. At the time of the Battle of Solebay, Captain Martenszoon commanded the frigate Visschers Harder. His ship was part of Lt-Admiral Banckert's squadron. The ship carried 26 guns and had a crew of 57 sailors and 51 soldiers. Circa 21 May 1673, Captain Martenszoon commanded the frigate Goes, which had a crew of 142.
Source:
Gerard Brandt, Het Leven en Bedrijf van den Heere Michiel de Ruiter, Amsterdam, 1687.