Glossary

Amps (A)

- The unit that measures the current following through a circuit. The current can be calculated by dividing the voltage by the resistance of the consumer. A resistance of 6 ohm and voltage of 12 volt gives a current of 2 amps.

Alternating Current (AC)

- AC is the electricity that for example comes out a socket in your home. Other terms used for AC include shore power, generator power or inverter power. AC voltage changes polarity with a
given frequency: In Europe, for instance, the polarity of the electrical voltage is reversed 50 times per second.

AGM Batteries

- Battery in which the electrolyte (a mix of water and sulphuric acid) is largely absorbed in glass fibre matting. As these batteries are entirely maintenance-free can be fitted anywhere and ventilation is usually unnecessary. Thanks to their construction, AGM batteries can be swiftly discharged while providing a very powerful current. This makes them highly suitable for systems that require high levels of current, such as bowthrusters, winches and engine starting.

ABYC Standards

- The American Boat & Yacht Council is a non-profit organisation that represents American builders. It sets standards and gives recommendations for nautical equipment (including
electrical equipment) on pleasure vessels with the goal of enhancing safety. The ABYC therefore issues certification for products.

Ah Amp-hour

- The unit that denotes the capacity of a battery, calculated by multiplying current in amps by the duration of the discharge in hours. For example: If a battery delivers a current of 5 amps in 20 hours with the voltage constantly above 10.5 volt, this amounts to 20 x 5 =100 Ah. The capacity of a battery usually depends on the amount of lead and battery acid it contains

ARQ

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AOR-W

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AOR-E

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ALRS

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ACK

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