What is the propultion in Tristan da cunha?

There is no information or evidence to suggest that propultion exists in Tristan da Cunha. Tristan da Cunha is a remote group of volcanic islands in the South Atlantic Ocean that has a limited population engaged in agriculture and fishing. There are no major industrial activities or advanced transport systems that require propulsion technologies. If you have a specific context or aspect of propulsion you would like to clarify, feel free to ask.