Which type are most generators used aboard ships?

Most generators used aboard ships are AC (Alternating Current) generators, primarily due to their efficiency and ability to supply power over long distances. AC generators are capable of producing power at various voltages and frequencies, making them versatile for different shipboard applications. Their ability to easily transform voltage levels with transformers allows for the efficient transmission and distribution of electrical power throughout the vessel.

In contrast, while DC generators have specific applications such as in charging batteries or providing power for starting motors, they are not commonly used for the primary generation of electricity aboard ships. Single-phase systems, although simpler, are limited in capacity and not suited for larger electrical loads typically found onboard maritime vessels. On the other hand, three-phase systems, which are often used in larger generators, also support increased efficiency and load capability, but generally, the term "AC" encompasses the most commonly used three-phase generators that dominate shipboard power distribution due to their greater efficiency in handling the power requirements of various onboard equipment.