sentences:  In 1761, the experiment was expanded, and the 32-gun frigate was ordered to have her entire bottom coppered, in response to the terrible condition in which she had returned from service in the West Indies.HMS "Alarm" was chosen because, in 1761, a letter had been sent regarding the ship's condition, saying that the worms from the waters had taken a significant toll on the ship’s wooden hull.Before the copper plates were applied, the hull was covered with Soft stuff, which was simply hair, yarn and brown paper.