© 2019 The Authors. International Journal of Nautical Archaeology © 2019 The Nautical Archaeology Society. Sewn-plank vessels have been a pervasive form of ship construction since antiquity. This paper provides an introductory overview of the current state of the field of sewn-plank studies, with a particular focus on the Indian Ocean. It describes the basic function of sewn-plank techniques, and then discusses textual references and historical approaches to the topic. The relevant archaeological evidence is reviewed, and prior ethnographic work relating to the topic is outlined. It summarizes numerous experimental sewn-plank reconstructions that have been undertaken and concludes with a discussion of the current directions of the field and suggestions for the future.