Yoal (Boat)

The yoal was the main vessel used for haaf (open water within sight of land, up to 10 miles from shore) fishing for cod, ling and tusk until the fish shoals moved further offshore at the end of the 17th century, probably due to climatic change.[4] Although yoals were not designed for the far haaf, Shetland fishermen continued to use them for relatively deep sea fishing with attendant accidents and loss of life until the introduction in the mid 18th century of the larger, heavier and deeper sixareen designed for fishing further offshore.

Source: Yoal – Wikipedia