ROPY 

PLAN MIOSNIP SECTION . on the British shores . Many vessels are cast every year on the rocky parts of the coasts, under cliffs, where no life-boat could be of service . In such places the rocket alone is available . The rocket apparatus consists of five principal parts, viz. the rocket, the rocket-line, the whip, the hawser and the sling life-buoy . The mode of working it is as follows . A rocket, having a light line attached to it, is fired over the wreck . By means of this line the wrecked crew haul out the whip, which is a double or endless line, rove through a block with a tail attached to it . The tail-block, having been detached from the rocket-line, is fastened to a mast, or other portion of the wreck, high above the water . By means of the whip the rescuers haul off the hawser, to which is hung the travel-ling or sling life-buoy .