Competence 3

60問 • 1年前

Leodegario Almaden jr.

通報

問題一覧

The transmitting range of an HF transmitter is mainly determined by?

the height of the transmitting antenna

What does a Modulation meant ?

to enhance the side bands in relation to the carrier wave

You are proceeding to a distress site where the survivors are in liferafts. Which action will assist in making your vessel more visible to the survivors ? Apply.... Red Book of Marine Engineering Questions & Answers Vol. 1 & 2.. Paterson W.B

Making smoke in daylight

The volume button of a mariphone controls ?

the volume

When all preparations have been made to ensure that the main engine is operational prior to departure what will be the final test to be carried out ?

Blow indicator cocks test reversing of engine short firing kick,

The HF-band in in the frequecy range of ?

3- 30 GHz

To avoid the possibility of a scavenging fire what important check is to be carried out every watch and more frequently if a damaged piston ring is suspected ?

The scavenging drain line is not clogged

On which ferquency are navigational and meteorogical message normally sent on the NAVTEX system ?

518KHZ

The call sign of a vessel is meant to ?

be able to identify oneself

What is the content of table #1 of radiotelephony procedures?

Phonetic alphabets and figure spelling

Which distress signal is required for a liferaft in ocean service and could be effectively used to attract the attention of aircraft at night? Understand... Red book of Marine Engineering Questions & Answers Vol. 1&2 Paterson, W.B.

Red flares

Which visual distress signal is acceptable for daylight use only ?

Hand-held orange smoke distress flare

Which of the listed requirements regarding VHF radiotelephone installations do not correspond to present regulations ?

Cargo ships of less than 500 tons gross shall have the batteries located in the upper part of the ship

What is the primary purpose for Digital Selective Calling (DSC)? Understand Red Book of Marine Engineering Question and Answers Vol. 1&2 Paterson, W.B.

DSC is to be used for transmitting and receiving distress alerts to and from the other ship or coast radio station via radio

Which one on the list can mainly restricted the VHF-transmission range?

The curvature of the surface of the earth

Automatic amplifier regulation is used for the following reasons ?

with varying incoming signal the variation in the out going signal is as small as possible

Which channel and mode should be used when initiating a distriss alert transmission?

Channel 70 DSC

On which frequency are navigational and meteorogical message normally sent on the NAVTEX system ?

518 KHZ

By non-reduces transmitting power in VHF is meant in a power between?

5-10 watt

Which of the listed requirements regarding radiotelephone auto alarm do not correspond to present regulations?

in presence of atmospheric or interfering signals automatically adjust itself

The maritime radio system consisting of a series of coast stations transmitting coastal warning is called?

NAVTEX

The wavelength of a radio-signal reflected against the F-layer may be ?

1.5 m

Which radio frequency/channels are reserved for emergency communication?

2182 kHZ/HF channel 16

What is meant by the degree of selectivity of a receiver?

ability to make weak station audible

On board and accident happened. Urgent radio-medical advice is needed. What category you should choose?

safety

What is a Plarization of a radio wave means?

the direction of the electrical field

In maritime communication two international treaties are primarily involved. They are ?

Solas and the international treaty of far messaging

The legal type VHF-antenna has a lenght of ?

1 meter

When onboard channel 16 is used for a shore radio-connection, you always work?

simples

What is the maximum range of a VHF radio-set from ship to ship at sea ?

200 Nautical Miles

What speed is known when the rotating shaft frequency and the natural vibrating frequency become synchronized at a particular speed?

Critical speed

Which of the following VHF marine frequencies have been set aside by the ITU for the international distress, safety and calling frequency?

One wishes to have a telephone conversation with a person whose name is known. This is what we called a

a personal call

For connection between VHF and antenna must be used ?

a copper wire of sufficient diameter to minimize loses

The transmitting power of the mariphone is adjusted by setting?

squelch

Which statement concerning GMDSS distress alerts is true? Understand.. Red Book of Marine Engineering Question & Answers... Eduard Sweetman Co.

Infomation contained in a distress alert includes the name and positio of the distressed vessel, and may include additional information such as the nature of the situation and what kind of assistance that may be requierd

The type-indication of the radio set is mentioned in ?

the equipment appendix

Distress alert initiated for other than an appropriate test, by communications equipment intended for alerting , when no distress situation actually exists

False alarm

With the use of INMARSAT and digital selective calling, distress alerts can be received ?

With the NAVTEX

Vessel with EPIRB, you must check ?

the working of the charger and check the loaded condition of the battery

On board an accident happened. Urgent radio-medical advice is needed. Which category you choose?

safety

What is the communication within the ship's emergency organization or communication within the shore emergency response team?

Internal communication

A radiotelegraph station station shall be provided with

direct access to the navigating bridge

How would you determined the wave length of a radio signal ?

frequency

In radiotelephone communications can you indicates the prefix PAN?

a calling station has an urgent messge about the safey of a person

When the voyage is to be of 48 hours or greater duration, which equipment must be tested NOT more than 12 hours prior to getting underway from a port?

Emergency generator

Which of the listed requirements regarding radiotelegraph installations do not correspond to present regulations?

The installation shall include equipment for radiotelephone communication on distress frequencies in addition to working frequencies

You are approcahing a port when you see three lights in a vertical line. the upper and lower are green and the middle white. what does this mean ?

A vessel may proceed only when it has received specific orders to do so

You have just received a call from the watchstander in the engine room reporting that a high temperature alarm for a main engine bearing has just sounded. Your next instruction to the watchstander should be to ?

bring the maine engine speed to idle

Squelch mode serves to suppress?

noise in speech-breaks in an SSB-signal

The VHF radiotelephone calling/safety/distress frequency is ?

156.8 MHz (channel 16),

The VHF-band is in the frequency range of ?

30-300 GHz

With an Inmarsat-C installation there is the heading addressing-option "special". Via this option?

You can send a message by express delivery

One wishes toa have a telephoen conversation with a person whose name is known. What type of call it is ?

a personal call

When the vessels steering wheel on the navigation bridge is turned, the difference existing between the position of the wheel and that of the rudder is known as ?

the error signal

Which one of the listed entries in the radio log for radiotelephone station do not correspond to present regulation? Entries in the radio log shall include

the condition and results of tests of the main radiotelegraph installation

Regulations require that any ship making a voyage of over a 48 hour duration' must have certain tests conducted not more than 12 hours prior to leaving port, this requirements includes the testing of

means of communication between the bridge and engine room

The main purpose of a radio transmitting installation onboard

to enhance the safety of lives at sea

Pledge of secrecy applies ?

only for those who want to send and/or receive a messge

In making VHF communication or test transmission , you must tell how, when, where, and why?

with DSC use, first broadcast the carrier wave for at least three seconds

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