Answer:
The navigation techniques for most large sailing vessels.
Step-by-step explanation:
The Norse culture were the experts at navigation. They were a cradle of explorers which encouraged them to improve the navigation techniques constantly. In fact, ships were not only means of transportation, but they were so inmersed in Norse culture that they became a symbol of status, prestige for the ship owner and the skipper. Navigation was involved in explorarion, trading, war and mythology, basically in the daily life of an average norseman.