Kuis kuisan

A safety loop is a feature of ..

• Long-wire antennas

• Inmarsat antennas

• Direction finding antennas

• Active whip antennas

A safety precaution when working aloft near a transmitter antenna, is to :

• ensure the transmission mode is at H3E

• disable the transmitter by removing the supply fuses

• lock the frequency on 2182 KHz with transmitter on low power and J3E

• ensure the transmitter is in the standby position only

Inmarsat “Fleet” equipment would normally be fitted with a :

• Yagi antenna

• 6-9 metre whip and/or a “long wire” antenna

• 1-1.5 metre dipole antenna

• Directional antenna

Safety loops are fitted to wire transmitting antennas to :

• prevent excessive electromagnetic leakage

• act as essential radiation element of the antenna

• prevent the antenna failing in case of increased tension

• isolate the antenna from earth

The correct safety action when the ship is involved in a thunderstorm is :

• use low power for transmission

• connect MF/HF aerials to ground

• open the transmitter circuit

• switch off the transceiver and remove the fuse

MF/HF DCS equipment should be tested :

• weekly by internal test

• daily with a coast station

• monthly with a coast station

• daily by internal test

An on-load test of radio batteries can be done by operating the transmitter on full power and with

the battery charger :

• off while observing the discharge current

• off while observing the battery voltmeter

• on while observing the discharge current

• on while observing the battery voltmeter

A full specific gravity check of a liquid lead acid battery should be carried out :

• monthly

• once per international voyage

• weekly

• daily

If a MF/HF transceiver indicates a fault condition, you should :

• carry out an internal DSC test as per the operational manual

• isolate the antenna and retest

• consult the fault finding guide in the user manual

• check the location of fuses in the user manual

The following equipment should be tested at least once a week :

• operation of 2182 KHz receiver

• reserve source of energy if it is not a battery

• SART, EPIRB and handheld VHF sets

• each printer for adequate paper