A Comparison of Effectiveness of Side-mount and Back-mount system in Scuba Diving
Han, Kil Hyung
Department of Underwater Diving Science & Technology
Graduate School of Korea Maritime University
The purpose of this study was to compare side-mount and back-mount scuba system necessary for the development of Technical scuba diving and to select the proper equipment configurations in different marine settings. To accomplish such study purposes, a series of experiments were conducted with a total number of 7 subjects who were capable of both side-mount and back-mount scuba system. In this study, not only on-equipment weight, diver's weight, its volume and time record, the number of finkicks, air consumption, and heart rate after swimming 220m at 5 m depth, but also the physical activity in underwater and safety were analyzed for the comparison. The collected data were analyzed using t-tests at the significance level of a=.05. Following findings were derived from current study.
First, the equipment weight of side-mount system is lighter than that of back-mount system except the regulator(right figure) in the comparison of effectiveness on land. Also, the total weight of all equipment of side-mount system is lighter than that of back-mount system. According to the result, the total weight of side-mount system is significantly lower than that of back-mount when putting on all equipment. In addition, the volume of back-mount system is significantly lower than that of side-mount. As a result of comparison of its effectiveness on land, it is discovered that the rearrangement of cylinder in side-mount system is able to move with its separation, while it is unable to move in back-mount.
Second, in terms of swimming effectiveness, it was found that the side-mount system had significantly lower levels of the time record, the number of finkicks, air consumption, and heart rate after 220 meters swimming than those of back-mount system. The underwater resistance on side-mount system is more reduced than back-mount system.
Third, in terms of physical activity in underwater with equipment, a range of vision by angle of head in side-mount system is significantly wider than that in back-mount system. In swimming position, the height of side was significantly lower on side-mount system than that on back-mount system.
Fourth, in terms of safety in underwater, the time record of the valve-drill was significantly more decreased in side-mount system than that in back-mount system