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.
First electrical generator Edit. The dynamo was the first electrical generator capable of delivering power for industry, and is still the most important generator in use in the 21st century. The dynamo uses electromagnetic principles to convert mechanical rotation into an alternating electric current.