Marine electronics: refers to electronics devices designed and classed for use in the marine environment on board ships and yachts where even a small amount of salt water can destroy some electronics devices. Therefore, the majority of these types of devices are either water resistant or waterproof. Marine electronics devices include chartplotter, marine VHF radio, autopilot and self-steering gear, fishfinder and sonar, marine radar, GPS, fibre optic gyrocompass, satellite television, and marine fuel management.
Electric propulsion :utilize electrical power to drive propeller blades for propulsion. From commercial and research ships through to fishing vessels, over recent years, electric propulsion has gained momentum in a wide range of marine applications.

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