1 In most situations the sailing boat is the stand-on vessel and the powerboat must give way. 2  If the sailboat is overtaking a powerboat, the powerboat is the stand-on vessel and the sailboat must give way. 3  Any boat with more maneuverability must give way to any boat with less maneuverability (see below). In most situations the sailing boat is the stand-on vessel and the powerboat must give way. 2  If the sailboat is overtaking a powerboat, the powerboat is the stand-on vessel and the sailboat must give way. 3  Any boat with more maneuverability must give way to any boat with less maneuverability (see below).
1832 - Hippolyte Pixii (France) built the first dynamo using a commutator, his model created pulses of electricity separated by no current. He also by accident created the first alternator. He did not know what to do with the changing current, he concentrated on trying to eliminate the alternating current to get DC power, this led him to create the commutator.
An Energy Extraction Device. Tesla, however, was not satisfied with his mechanical self-sustaining generator. The dynamo would provide the energy to run a single machine, but his vision was to light cities and in the 1900 Century magazine article he elaborated on the theory of such a machine.n the 1880's, Nikola Tesla invented the alternating current system we use today. By the 1890's, he was working on a new type of electrical generator that would not consume any fuel..