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For a review that explains how the Velodyne Martinin 1.5 works: http://features.boats.com/boat-content/2013/03/the-velodyne-martini-1-5-active-suspension-on-a-boat/ For more videos from the Miami Boat Show, visit www.boats.com. The Velodyne Martini 1.5 was the wackiest, and most technically impressive, thing I saw at this year's Miami International Boat Show. In a nutshell, the Martini 1.5—so-named because it will keep your drink from sloshing—is a pontoon boat with active suspension. The system is the creation of Velodyne founder David Hall and a team of very enthusiastic engineers, some of whom were at Miami and gave me a demo ride on the boat. Hall and the Velodyne name may be familiar to audiophiles, as he got his start in 1983 with a patented, accelerometer-based High Gain Servo System to control sub-woofer cone movement. The company, which is based on the fringe of Silicon Valley near Morgan Hill, California, is still in the speaker business and has also developed the Velodyne LiDAR system used for 3D mapping. At Miami, one of the engineers explained that the Martini 1.5 is based on the same premise as their original speaker, "but instead of measuring and reacting to the movement of the speaker cone, we are reacting to the movement of the boat deck to cancel out the action of the waves."
Land diving is a ritual performed by the men of the southern part of Pentecost Island, Vanuatu. Men jump off wooden towers close to 90 feet high, with two tree vines wrapped around the ankles. Land diving is done by tying vines to each ankle. According to the Guinness World Records, the g-force experienced by those at their lowest point in the dive is the greatest experienced in the non-industrialized world by humans. The origin of land diving is described in a legend of a woman who was dissatisfied with her husband, . It is sometimes claimed that the woman was upset that her husband was too vigorous regarding his sexual wants, so she ran away into the forest. Her husband followed her, so she climbed a banyan tree.She tied lianas to her ankles and jumped and survived. Her husband jumped after her, but did not tie lianas to himself, which caused him to plummet and die. Originally, women did it in respect to the original woman who did it, but husbands were not comfortable with seeing their wives in such positions, so they took the sport for themselves, and it gradually changed from trees to specifically designed wooden towers. The men performed the original land diving so that they would not be tricked again.