Single-phase generator The early generators for those single-phase traction networks are single-phase generators. Even with newer three-phase motors which were introduced to some modern trains, the single-phases transmission for traction networks survive their time and are still in use in many railways today. However, many traction power stations have replaced their generators over time to use three-phase generators and convert into single-phase for transmission. In the early development of hydroelectricity, single-phase generators played an important role in demonstrating the benefits of alternating current. In 1891, a 3,000 volts and 133 Hz single-phase generator of 100 horsepower was installed at Ames Hydroelectric Generating
Single-handed sailing sailing under command of a single handed sailor flying the ICS Pennant Numeral 1 from the backstay has been practiced and advocated by some sailors. As the use of Pennant Numeral 1, a white pennant with a big red dot in the middle much resembling the flag of Japan, for this purpose is not (yet) widely spread and even often confined more to certain geographical areas (Baltic...) the use of it has been questioned although the general consensus is that any signage that can increase safety at sea is to be supported. Single-handed sailing The sport and practice of single-handed