His work focuses on the mechanics of naval warfare and maritime trade. In paintings like De slag op de Zuiderzee, he records specific ship types and rigging with accuracy. He used a muted palette of greys and browns to depict the North Sea. De Verwer avoided the dramatic lighting common in later Baroque art. Instead, he preferred clear, even light that allowed for a precise study of hull shapes and water movement.

Modern collectors value these prints for their historical precision and calm atmosphere. The compositions often feature large areas of open sky and water. These elements provide a sense of space in a room. His depictions of Vlissingen and the Zuiderzee offer a record of seventeenth-century Dutch life. These works suit interiors that favour traditional nautical themes or minimalist decor.