Sailing the fjords like the Vikings yields unexpected insights
https://arstechnica.com/science/2025/06/this-archaeologist-built-a-replica-boat-to-sail-like-the-vikings/
Greer Jarrett has identified four possible small ports, or "havens," used by Vikings along the Norwegian coast.
Original research paper here https://link.springer.com/article/10.1007/s10816-025-09708-6