 The sand beaches at Tenby were a hazard due to the speed of the tide, and an obstacle to overcome while dragging a 2-ton lifeboat from the harbour.When in 1905 the time came to replace the boat with a larger and heavier one, a new boathouse and roller slipway were built on the north side of Castle Hill.It was constructed using the new screw-piles that had been created for the foundations in deep sand of Victorian era pleasure piers.