Glossary

ECDIS

- Electronic chart display and information system (ECDIS)

ECDIS is an interactive electronic navigation information system for ships which facilitates the simultaneous display of navigational charts, the current position of the ship as well as its movements and additional information (radar, AIS, echo sounder, etc.) on the screen. It assists the navigating officer in planning and monitoring the route and offers automatic alert functions for particular emergency situations.

EMC

- Short for Electro-Magnetic Compatibility, EMC indicates how much, if any, electromagnetic interference a device may produce and whether it is sensitive to electromagnetic interference from the outside. A good example is that of a battery charger and a microwave oven. The microwave is not allowed to produce more interference than determined by the EMC standard, and the battery charger may not be affected by the interference generated by the microwave. Naturally, the opposite also holds true. Requirements in terms of EMC are established within the CE framework.

E-Mark

- This regulation is the type-approval test for European automotive electronics. It includes a variety of testing including RF immunity and emissions, transient immunity and emissions. It now includes a requirement for burst, surge, harmonics & flicker and provides advice and requirements for electrical vehicles.

Electrolyte

- The liquid in batteries, composed of a mixture of sulphuric acid and water. Its specific gravity is 1.280 in a charged battery and 1.100 in a discharged one

Earth (electricity)

- The electric no-load potential, also called reference potential. The negative pole of a battery is often connected to the steel chassis of a vehicle or boat, which then serves as the earth. In US English the term grounding is used.

Electrical current

- The flow of electrons through a circuit. Electric current is measured in Amps.

EPIRB

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ELT

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EGC

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