Subasta Bidspirit | Dutch school, late 18th century

Dutch school, late 18th century - Dutch school, late 18th century, 'Study into ship types', unclearly signed in ink 'Otho van Nos (?)' bottom right. Probably by a Lutheran student at the maritime school. Part of the exam was copying pictures from a nautical textbook., Pen drawing on paper, 15,4 x 21 cm.