NBTC ONE STOP SERVICE

แบบฝึกหัดพนักงานวิทยุคมนาคมประเภทจำกัดเขตเดินเรือทะเล(ROC)

แบบฝึกหัดพนักงานวิทยุสมัครเล่น

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แบบฝึกหัดพนักงานวิทยุคมนาคมประเภททั่วไปประจำเรือ (GOC)

หมวดที่ 1. General Information and System Overview และ Principles of Communications

หมวดที่ 2. F.C.C. Rules & Regulations และ DSC & Alpha-Numeric ID

หมวดที่ 3. Distress, Urgency & Safety Communications และ Section-F: Survival Craft Equip & S.A.R

หมวดที่ 4. VHF-DSC Equipment & Communications และ Maritime Safety Information (M.S.I.)

หมวดที่ 5. Inmarsat Equip. & Communications และ MF-HF Equip. and Communications

แบบฝึกหัดพนักงานวิทยุคมนาคมประเภทจำกัดเขตเดินเรือทะเล (ROC)

หมวดที่ 1. General Information and System Overview และ F.C.C. Rules & Regulations

หมวดที่ 2. DSC & Alpha-Numeric ID Systems และ Distress, Urgency & Safety Communication

หมวดที่ 3. Survival Craft Equip & S.A.R, Maritime Safety Information (M.S.I.) และ VHF-DSC Equipment & Communication

เฉลย

ทดสอบอีกครั้ง

คำถามที่ 1/50

90:00 นาที

At what point does a SART begin transmitting?

A. It immediately begins radiating when placed in the "on" position.

B. If it has been placed in the "on" position, it will respond when it has been interrogated by a 9-GHz radar signal.

C. It must be manually activated or water activated before radiating.

D. If it has been placed in the "on" position, it will begin transmitting immediately upon detecting that it is in water.

คำถามที่ 2/50

90:00 นาที

What is not an advantage of an AIS SART signal when compared to a radar-based SART signal?

A. The AIS SART can be detected much farther away than radar SART models.

B. Not every AIS transmission needs to be received to achieve an accurate presentation of the location.

C. The AIS SART position has GPS accuracy and transmits on AIS VHF frequencies.

D. AIS SART units may be easier to find in poor radar target conditions.

คำถามที่ 3/50

90:00 นาที

Why should functional testing of a SART be minimized?

A. Potential interference with safe navigation, notifying other vessels of an actual Distress and minimize power consumption.

B. Minimize power consumption of the battery and only test at sea to reduce potential interference or confusion.

C. Possibility of misinterpretation by other vessels as a Distress situation and only test in port to prevent potential interference with safe navigation or at-sea vessels.

D. Potential interference with safe navigation, possible misinterpretation of an actual Distress, minimizes draining the battery.

คำถามที่ 4/50

90:00 นาที

What feature is not a component of a 406 MHz satellite EPIRB?

A. 121.5 MHz emergency homing transmitter.

B. Emergency transmission on 406.025 MHz.

C. Float-free release bracket.

D. Aural locator signal.

คำถามที่ 5/50

90:00 นาที

What statement is true regarding 406 MHz EPIRB transmissions?

A. Transmits a unique hexadecimal identification number.

B. Allows immediate voice communications with the RCC.

C. Coding permits the SAR authorities to know if manually or automatically activated.

D. GMDSS Radio Operator programs an I.D. into the SART immediately prior to activation.

คำถามที่ 6/50

90:00 นาที

Which piece of required GMDSS equipment is the primary source of transmitting locating signals?

A. Radio Direction Finder (RDF).

B. Survival Craft Transceiver.

C. An EPIRB transmitting on 406 MHz.

D. A SART transmitting on 406 MHz.

คำถามที่ 7/50

90:00 นาที

What part of a satellite EPIRB may function as a visual aid to rescue vessels?

A. Strobe light

B. A 121.5 MHz emergency transmitter in a satellite EPIRB.

C. 406 MHz signal from a satellite EPIRB.

D. Loud beeping tone emitted by the unit, once activated.

คำถามที่ 8/50

90:00 นาที

The determination that the Distress traffic is over is usually made by whom?

A. The vessel in Distress.

B. The “On Scene Coordinator” and/or the RCC controlling the Distress traffic.

C. The first Coast Station to receive the DSC Distress alert.

D. Other vessels after nothing has been heard for some time.

คำถามที่ 9/50

90:00 นาที

Passenger vessel “On Scene” communications should be conducted with aircraft on which of the following channels or frequencies?

A. 9 GHz

B. VHF Ch-13

C. VHF Ch-26

D. VHF 121.5 MHz

คำถามที่ 10/50

90:00 นาที

Which of these would be vital to a GMDSS SAR situation in polar regions?

A. GOES satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity.

B. GOES satellites to receive Distress Alerts and Inmarsat Voice for follow-on and SAR activity.

C. Inmarsat satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity.

D. COSPAS/SARSAT satellites to receive Distress Alerts and VHF-HF Voice for follow-on and SAR activity.

คำถามที่ 11/50

90:00 นาที

What information is transmitted by a 406 MHz EPIRB alert?

A. Vessel position and nature of Distress.

B. A unique Hexadecimal I.D. number.

C. Vessel name and identification.

D. Vessel MMSI number and position.

คำถามที่ 12/50

90:00 นาที

Which statement is false regarding the COSPAS-SARSAT system and EPIRB operations?

A. The EPIRB’s position is calculated by the system and passed to the MCC.

B. The EPIRB transmits a unique Hex I.D. and vessel position that may be passed to the RCC.

C. The EPIRB’s position and Hex I.D. is passed instantaneously to the RCC.

D. The EPIRB transmits a unique Hex I.D. that is passed to the RCC if it cannot be determined to be inadvertent by the MCC.

คำถามที่ 13/50

90:00 นาที

What information should be contained in a detailed Distress message that was not transmitted by an initial Distress “hot-key” alert?

A. Vessel position, course & speed and the nature of Distress.

B. The distress vessel’s IMN and position at the time of alert.

C. Vessel name & call sign, POB and all potential means to communicate with the vessel.

D. Vessel name & call sign, distress vessel’s IMN & vessel position.

คำถามที่ 14/50

90:00 นาที

Which GMDSS equipment is best suited to simultaneous long-range communications with an RCC/coast station and OSC vessels or SAR aircraft?

A. MF-HF SITOR (NBDP) transmitters using telex follow on frequencies.

B. Inmarsat Signals routed via the RCC to the SAR vessels & aircraft under their control.

C. VHF transmitters to reach SAR aircraft and OSC vessels as well as the RCC/coast station.

D. MF-HF SSB transmitters using voice follow-on frequencies.

คำถามที่ 15/50

90:00 นาที

What are the best resources for researching and planning equipment setups and updates prior to any potential Distress situation?

A. NGA Pub. 117, Inmarsat hanossok or manufacturer’s equipment manuals.

B. Inmarsat hanossok, FCC Part 80 or ITU List of Coast stations.

C. ITU List of Coast stations, IMO GMDSS hanossok, FCC Part 80.

D. Inmarsat hanossok, NGA Pub. 117 or ITU List of Coast stations.

คำถามที่ 16/50

90:00 นาที

What should a GMDSS Radio Operator do if a NAVTEX warning message is received but it contains too many errors to be usable?

A. Contact the NAVAREA coordinator and request a repeat broadcast.

B. Initiate a request for Category A, B, L and D messages.

C. Do nothing. Vital NAVTEX messages will be repeated on the next scheduled broadcast.

D. Listen to appropriate VHF weather channel for repeat warnings.

คำถามที่ 17/50

90:00 นาที

Which of these cannot happen when a paper model NAVTEX receiver runs out of paper?

A. The unit is unable to print messages and all subsequent MSI broadcasts may be missed until the paper is replaced.

B. It may give off either an audible and/or visual alarm.

C. MSI messages may be missed because the unit cannot print them out.

D. The system will automatically change from receiving MSI by NAVTEX to receiving it by SafetyNETTM so that no messages will be lost.

คำถามที่ 18/50

90:00 นาที

Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally?

A. 518 kHz

B. 2187.5 kHz

C. 4209.5 kHz

D. VHF channel 16 when the vessel is sailing in Sea Area A1, and 2187.5 kHz when in Sea Area A2.

คำถามที่ 19/50

90:00 นาที

Which of the following statements is true?

A. No NAVTEX receiver can be programmed to reject category A, B, D and L messages since they are mandatory to be received via NAVTEX.

B. A GMDSS Radio Operator may choose to program certain NAVTEX receivers to reject category A, B, D and L messages if they are being received by another MSI system.

C. Upon entering a new NAVTEX station's broadcast range, the GMDSS Radio Operator enters the station's SELCAL number.

D. The GMDSS Radio Operator can select the "None" option in the message category menu.

คำถามที่ 20/50

90:00 นาที

What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system?

A. Operating the receiver only during daytime hours.

B. Coordinating reception with published broadcast schedules.

C. Programming the receiver to reject certain stations and message categories.

D. Automatic receiver de-sensitization during night hours.

คำถามที่ 21/50

90:00 นาที

What statement is true regarding the control the operator can exercise over the NAVTEX receiver's operation?

A. The operator can set the unit to automatically reject any and all categories of messages if the ship desires to not receive them.

B. Upon entering a coastal area for the first time, the operator enters code KK to indicate "ready to receive NAVTEX".

C. The operator can set most units to reject all messages except navigation, meteorological warnings, and search and rescue messages. If the unit will reject such messages it may be unsafe to do so.

D. To reduce the number of messages, the operator can select code 00 to indicate "not in coastal passage".

คำถามที่ 22/50

90:00 นาที

What determines whether a NAVTEX receiver prints a particular type of message content from a programmed NAVTEX station?

A. The serial number and type of message have already been received but additional printouts are generated to ensure receipt aboard the vessel.

B. The serial number and type of message has not been previously received or the subject indicator has not been programmed for rejection.

C. The subject indicator has been programmed for rejection by the operator but the message contains a priority override print command.

D. The transmitting station ID covering your area has been programmed for rejection by the operator or has not been previously received.

คำถามที่ 23/50

90:00 นาที

Which information determines if a NAVTEX message is to be rejected?

A. Transmitter identity (numerals from 1 to 26 identifying transmitting station within the NAVAREA).

B. The second letter (from A to Z) in the header indicating the type of message.

C. The Answerback of the receiving station has not been entered in the NAVTEX receiver.

D. Only messages having a serial number 00 are rejected.

คำถามที่ 24/50

90:00 นาที

What system can provide an automated service in coastal waters where it may not be feasible to establish the NAVTEX service or where shipping density is too low to warrant its implementation?

A. AMVER

B. VHF DSC

C. ARQ SITOR (NBDP)

D. SafetyNETTM

คำถามที่ 25/50

90:00 นาที

Aboard ship, SafetyNETTM. messages can be received by which equipment/methods?

A. EGC receiver of the vessel's Inmarsat-C SES.

B. VHF DSC on the weather channels.

C. NAVTEX Receiver on 518 kHz or the Tropical Navtex frequency

D. HF SITOR (NBDP) MSI frequencies.

คำถามที่ 26/50

90:00 นาที

Which satellite system promulgates Maritime Safety Information?

A. AMVER

B. NAVTEX

C. Inmarsat-C SafetyNETTM

D. Inmarsat-M SES

คำถามที่ 27/50

90:00 นาที

In using SafetyNETTM. for the receipt of MSI (Maritime Safety Information):

A. Only unscheduled Urgency and Distress messages will be received if the Inmarsat-C SES is not logged in.

B. All of these answers are correct.

C. Both scheduled MSI and unscheduled Urgency and Distress messages will be received if the Inmarsat-C SES is logged in.

D. The Inmarsat-C SES must have Enhanced Group Calling (EGC) capability to receive MSI.

คำถามที่ 28/50

90:00 นาที

What system may be useful for messages, such as local storm warnings or a shore-to-ship Distress alert, for which it is inappropriate to alert all ships in the satellite coverage area?

A. NAVTEX

B. AMVER

C. EGC

D. DSC

คำถามที่ 29/50

90:00 นาที

What services are available through Enhanced Group Calls?

A. Maritime Safety Information and vessel traffic lists.

B. Hourly NOAA weather broadcasts from the NWS.

C. Maritime Safety Information and messages to pre-defined groups of subscribers.

D. Coastal weather broadcasts.

คำถามที่ 30/50

90:00 นาที

What messages originate from registered information providers anywhere in the world and are broadcast to the appropriate ocean region via a LES?

A. AMVER broadcasts

B. Urgency messages

C. NAVTEX broadcasts

D. SafetyNETTM messages

คำถามที่ 31/50

90:00 นาที

Setting the squelch control to the end of its range without any noise being heard results in:

A. Less background noise

B. Minimum sensitivity

C. Maximum sensitivity

D. Does not have any effect on the sensitivity.

คำถามที่ 32/50

90:00 นาที

Proper and legal VHF operations require all of these except?

A. The channel must be designated as valid for the nature or type of communications desired.

B. Simplex, duplex and alpha channel modes must be correctly selected.

C. The correct bandwidth must be selected by the operator.

D. The power level must be appropriately chosen by the operator.

คำถามที่ 33/50

90:00 นาที

While conducting routine communications using the wheelhouse VHF with a station 1 mile distant, your recommended power setting would be:

A. 25 watts after dark.

B. 25 watts during a clear sunny day.

C. 1 watt, day or night.

D. 1 watt using DSC at night.

คำถามที่ 34/50

90:00 นาที

Much longer than normal VHF transmissions are typically caused by:

A. Atmospheric ducting or tropospheric propagation.

B. Changing power from 1W to 25 W.

C. Skywave reflections from the D layer.

D. Ionospheric activity in layers F1/F2.

คำถามที่ 35/50

90:00 นาที

The effectiveness of VHF communications is maximized by:

A. Appropriate setting of the transmitter power, selecting an appropriate channel & adjustment of squelch for maximum receiver sensitivity.

B. The adjustment of squelch for maximum receiver sensitivity, setting transmitter power to 1W & selecting an appropriate channel.

C. Selecting an appropriate channel, adjustment of squelch for minimum receiver sensitivity & setting transmitter power to 1W.

D. Selecting an appropriate channel, adjustment of squelch for minimum receiver sensitivity, setting transmitter power to 25W.

คำถามที่ 36/50

90:00 นาที

What channel would you use for routine communications with the U.S.C.G.?

A. Ch-16

B. Ch-80

C. Ch-22A

D. Ch-13

คำถามที่ 37/50

90:00 นาที

What channel would you use to place a call to a shore telephone?

A. Ch-16

B. Ch-70

C. Ch-06

D. Ch-28

คำถามที่ 38/50

90:00 นาที

What channel is always being continuously monitored?

A. Ch-70

B. Ch-28

C. Ch-80

D. Ch-16

คำถามที่ 39/50

90:00 นาที

What is the reason for the USA-INT control or function?

A. It changes some channels that are normally duplex INT channels into simplex USA channels.

B. It changes some channels that are normally simplex INT channels into duplex USA channels.

C. When the control is set to “INT” the range is increased.

D. It changes duplex USA channels to simplex for International use.

คำถามที่ 40/50

90:00 นาที

Which of the following statements is true?

A. You should always use the “INT” setting for calling a Public Correspondence station.

B. Using the “USA” setting changes certain channels from duplex to simplex operation.

C. You should use Ch-22 when calling the U. S. Coast Guard.

D. Using the “INT” setting will prevent proper Ch-13 Bridge-to-Bridge operations.

คำถามที่ 41/50

90:00 นาที

The USA-INT control on VHF units:

A. Selects duplex operations for U.S. coastal waters and simplex operations in non-U.S. waters, on the "alpha" channels.

B. Ensures that the “alpha” channels are correctly set to duplex for use in U.S. waters & on VTS channels.

C. Changes selected international duplex channels to simplex channels for use in U.S. waters, on the "alpha" channels.

D. Changes selected international simplex channels to duplex channels for use in U.S. waters, on the "alpha" channels.

คำถามที่ 42/50

90:00 นาที

The USA-INT control on VHF units:

A. Was made necessary by a desire for more duplex channels in the U.S.

B. Correctly set, will result in duplex operations in U.S. Coastal waters on the "alpha" channels.

C. Correctly set, will result in simplex operations in U.S. Coastal waters on the "alpha" channels.

D. Was made necessary by a desire to convert simplex international channels to duplex channels in the U.S.

คำถามที่ 43/50

90:00 นาที

A DSC Urgency priority call is usually set up in the following manner:

A. Such calls are sent first to all coast stations and then later to all ship stations.

B. Such calls are sent to an individual coast station.

C. Such calls are sent to an individual ship station.

D. Such calls are sent simultaneously to “all stations”.

คำถามที่ 44/50

90:00 นาที

A DSC Safety call might be used under the following conditions:

A. Navigation Hazard

B. Man overboard

C. Distress situation

D. Serious medical request

คำถามที่ 45/50

90:00 นาที

To send a Distress alert use the following procedure:

A. Initiate a menu call to select Ch-16 for voice communications.

B. Use the “Distress Hot Key” in an appropriate manner.

C. Always insert the nature of the Distress first.

D. Make a voice Mayday call on Ch-16 before any other action.

คำถามที่ 46/50

90:00 นาที

DSC Urgency priority calls may be sent using the “Distress Hot Key” under the following circumstances:

A. If no additional information is required to be transmitted.

B. Under NO circumstances.

C. Only if the position information is correct.

D. The “Distress Hot Key” can be programmed for either Urgency or Distress as required.

คำถามที่ 47/50

90:00 นาที

A DSC Safety priority call might be used under the following circumstances:

A. A crew member is missing and presumed lost overboard.

B. There is a fire in the engine room.

C. A lifeboat has been lost over the side in heavy weather and is adrift.

D. A medical situation that did not present an imminent danger of loss of life.

คำถามที่ 48/50

90:00 นาที

If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?

A. Look in the DSC Distress call data directory for the MMSI number of the other vessel.

B. The vessel’s MMSI number could be manually entered during the call setup.

C. The vessel’s name and MMSI number may be entered in the address book for use.

D. Look the number up in the ITU books and manually call the vessel.

คำถามที่ 49/50

90:00 นาที

What conditions must exist for a completely automatic DSC acknowledgement of a Routine call and change to suggested working channel?

A. Both stations must be monitoring Ch-16 or the sending station must be set up for automatic DSC response.

B. The receiving station must be monitoring the suggested working frequency.

C. All routine priority DSC calls must be manually acknowledged by the watch officer.

D. The receiving station must be set up for automatic DSC response.

คำถามที่ 50/50

90:00 นาที

Which of the following statements on address book entries is not correct?

A. Shore based telephone numbers may be entered for automatic telephone calls ashore.

B. Address book entries can only be used to call shore stations.

C. Public Correspondence Stations may be entered.

D. A vessel’s name and MMSI number may be entered.

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