The vessels at the jetty on the left, which may belong to the toll-house at the estuary of the river Maas, have Dutch flags. The man-of-war at anchor on the right has the arms of the Province of Holland on her stern and flies the flag of the Dutch Republic. The largest ship at the jetty on the left is probably a gaff-rigged 'wijdschip' (a small Dutch transport vessel); the smaller one nearest the viewer is a 'kaag' (a Dutch vessel with a straight raking stem and clinker-built).
This type of marine painting reflects the pride the Dutch took in their seafaring power. It was probably painted in the late 1640s.