By the turn of the century, Vosper was prospering as a general-purpose builder of small craft, boilers and marine engines, for which they had made a name for themselves as a producer of reliable designs. In the lean times after World War I, they concentrated mainly on ship repair to survive.
Vosper was known for their reliable designs in the early 20th century, building various types of craft, boilers, and marine engines. After World War I, they focused on ship repairs as a means to survive during economic hardship.