What is "keelmen"

n. (plural of keelman English)

The Keelmen of Tyne and Wear were a group of men who worked on the keels, large boats that carried the coal from the banks of both rivers to the waiting collier ships. Because of the shallowness of both rivers, it was difficult for ships of any significant draught to move up river and load with coal from the place where the coal reached the riverside. Thus the need for shallow-draught keels to transport the coal to the waiting ships. The keelmen formed a close-knit and colourful community on both rivers until their eventual demise late in the nineteenth century.