NBTC ONE STOP SERVICE

แบบฝึกหัดพนักงานวิทยุคมนาคมประเภททั่วไปประจำเรือ(GOC)

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

Which satellite should be chosen when operating in the Eastern Gulf of Mexico?

A. POR

B. IOR

C. AOR-W

D. AOR-E

คำถามที่ 2/50

90:00 นาที

Which longitude corresponds to the AOR-W satellite for Inmarsat-B/C communications?

A. 64E

B. 178E

C. 15.5W

D. 54W

คำถามที่ 3/50

90:00 นาที

When logging into the Inmarsat system using Inmarsat-C, it is necessary to:

A. Enter your IMN.

B. Select the Ocean Region.

C. Enter the LES answer back.

D. Call the LES and inform them that you are now operating in the appropriate ocean region.

คำถามที่ 4/50

90:00 นาที

Why is the automatic answerback request (WRU) first used by the LES after an Inmarsat-B TELEX call has been placed from a ship?

A. Let the LES operator know the printer is functioning correctly.

B. Get the identity of the ship station and start the channel assignment process.

C. Verify that there is a good connection with no transmission errors.

D. Identify the SES making the request.

คำถามที่ 5/50

90:00 นาที

When engaging in voice communications via an Inmarsat-B of F77 terminal, what procedures are used?

A. CODECs are used to digitize the voice signal.

B. Noise-blanking must be selected by the operator.

C. The voice signal must be compressed to fit into the allowed bandwidth.

D. The voice signal will be expanded at the receiving terminal.

คำถามที่ 6/50

90:00 นาที

How is a signal radiated from an Inmarsat-C system's antenna?

A. It is a highly focused directional signal that must be beamed at the desired satellite.

B. It is usually radiated in an omni-directional pattern, but an optional feature allows it to be directional for use when the vessel is on the fringe of the satellite's footprint.

C. It is radiated in an omni-directional pattern.

D. It is radiated in an omni-directional pattern that can be reversed by the Operator to attain directional beaming to an alternate satellite.

คำถามที่ 7/50

90:00 นาที

With an Inmarsat-C LES, how are messages routed to receiving stations?

A. All messages are forwarded via a store and forward network.

B. Direct connections are made to the receiving stations via gateways.

C. Intermediary stations are used to connect the sending station with the receiving station in a real-time mode.

D. Messages are stored until the network is polled by the receiving station.

คำถามที่ 8/50

90:00 นาที

Which of the following best describes a shipboard Inmarsat-C system?

A. A small, lightweight terminal capable of providing satellite store-and-forward message communications.

B. A satellite communications system that provides real-time connectivity.

C. A small, lightweight terminal used to transmit messages over high frequency (HF) bands to communicate through a satellite.

D. A satellite communications system that also provides continuous Digital Selective Calling coverage for all ocean regions.

คำถามที่ 9/50

90:00 นาที

It is possible to transmit all of the following via Inmarsat-C from a vessel except?

A. TELEX

B. Text for delivery by fax.

C. Voice

D. x.400 data services

คำถามที่ 10/50

90:00 นาที

Which of the following best describes the full range of services provided by the Inmarsat-C Satellite system?

A. Polling, enhanced group call, and one-way position and data reporting via satellite.

B. FM voice communications via satellite.

C. Two-way messaging and data communications on a store-and-forward basis.

D. Polling, enhanced group call, one-way position and data reporting via satellite, two-way messaging and data communications on a store-and-forward basis.

คำถามที่ 11/50

90:00 นาที

Which Inmarsat Earth stations could a GMDSS Radio Operator select for routine Inmarsat-C traffic if the vessel is in the Sea of Japan and logged-in to the POR satellite?

A. Beijing (PRC), Santa Paula (USA), Auckland (New Zealand) or Sentosa (Singapore).

B. Auckland (New Zealand), EIK (Norway), Sentosa (Singapore) or Beijing (PRC).

C. Yamaguchi (Japan), Southbury (USA), Pune (India) or Haifa (Israel).

D. Southbury (USA), Thermopylae (Greece), Psary (Poland) or Tangua (Brazil).

คำถามที่ 12/50

90:00 นาที

To request medical assistance from Inmarsat via voice (using an Inmarsat-B SES) what would be the correct procedure?

A. Enter 36# and then the phone number for the Inmarsat medical advisory system.

B. Enter 32# and then the phone number for the Inmarsat medical advisory system.

C. Enter 32# to request the Inmarsat medical advisory system.

D. Enter 32+ to request the Inmarsat medical advisory system.

คำถามที่ 13/50

90:00 นาที

You are on a ship in the Pacific ocean. What keyboard entry would you make on an Inmarsat-B terminal to obtain a TELEX connection via Santa Paula to another ship that is 300 miles west of San Francisco?

A. 001# 00582430353680#

B. 003+ 00582430353680+

C. 001+ 00582336657450+

D. 002+ 00582336850450+

คำถามที่ 14/50

90:00 นาที

Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the AOR-E?

A. 870436772983

B. 571436772983

C. 581323500120+

D. 581323500120

คำถามที่ 15/50

90:00 นาที

Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the POR?

A. 582436559121

B. 870436559121

C. 582436559121+

D. 583436559121+

คำถามที่ 16/50

90:00 นาที

Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the IOR?

A. 853446323868

B. 583446976519

C. 582446323868

D. 870446976519

คำถามที่ 17/50

90:00 นาที

If your vessel is in the AOR-E, which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside TELEX terminal number 776424 in Canada via the TWX system (TELEX country code 26)?

A. 26776424

B. 58126776424

C. 582776424

D. 26776424+

คำถามที่ 18/50

90:00 นาที

Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine number 1424-8821-902 in the United Kingdom (voice country code 44)?

A. 44 1424-8821-902

B. 4414248821902#

C. 44+ 14248821902+

D. 4414248821902

คำถามที่ 19/50

90:00 นาที

To send message traffic to an Internet address using an Inmarsat- C terminal -- what action would be required?

A. Select the recipient using the e-mail code from the address book (or manually select the code.)

B. Insert the Internet address into the correct field when creating the message file.

C. Select the recipient using the e-mail code into the DNID/ENID setup e-mail function.

D. Insert the Internet address into the correct field of the System setup e-mail function.

คำถามที่ 20/50

90:00 นาที

Which of the following is not correct with regard to Inmarsat-C e-mail?

A. It is possible to send e-mail messages from your ship’s Inmarsat-C terminal to any e-mail address in the world.

B. To receive e-mails from shore, your ship’s e-mail address must be registered with an Inmarsat C Land Earth Station Service Provider.

C. An additional hardware upgrade is required to enable your ship’s Inmarsat-C terminal to send and receive e-mails.

D. Not all land earth station service providers support e-mail service.

คำถามที่ 21/50

90:00 นาที

How is an Inmarsat Distress priority message ordinarily initiated on board the vessel?

A. By pressing one or more dedicated "Distress key" controls on the equipment.

B. By dialing the correct code on the telephone remote unit.

C. By contacting the LES operator and announcing a Distress condition is in progress.

D. By contacting the LES operator using the radiotelephone Distress procedure "Mayday”... etc.

คำถามที่ 22/50

90:00 นาที

What statement is true regarding LES codes and Inmarsat “hot-key” alert default menus?

A. Automatic or manual updating of the LES code only needs to be done when switching to a different ocean region satellite.

B. The SAR jurisdiction software automatically updates the “hot-key” menu based on the vessel’s position.

C. The LES code is determined by the NAVAREA based on the vessel’s current position.

D. The LES code must be updated by the officers depending upon the SAR jurisdictions the vessel transits and current ocean region satellite in use.

คำถามที่ 23/50

90:00 นาที

A vessel loses Inmarsat-B SES operation after a large course change. Which of the following could most likely cause this?

A. Shadowing of the SES antenna by clouds or other weather formations.

B. Misalignment of the shadow correction filter.

C. The vessel sailed beyond the footprint of the satellite coverage.

D. System loses gyro follow-up or a gyro system malfunction.

คำถามที่ 24/50

90:00 นาที

Which statement is correct regarding a method that a vessel experiencing problems with shadowing of an Inmarsat-B (or F77) SES antenna by an on-board obstruction could use to attempt reliable communications?

A. Change course to remove the shadow.

B. Change the Coast Station ID programming.

C. Install a shadow correction filter.

D. Switch from TELEX to voice mode.

คำถามที่ 25/50

90:00 นาที

A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?

A. Extremely heavy rain/snow storms.

B. Local RF interference by in-port cell phone or other radio systems.

C. Shadowing caused by an obstacle, such as a mast, between the SES antenna and the satellite.

D. The vessel is on the fringe of the coverage area of the satellite.

คำถามที่ 26/50

90:00 นาที

For general communications purposes, paired frequencies are:

A. Normally used with private coast stations.

B. Normally used between ship stations.

C. Normally used with public coast stations.

D. Normally used between private coast and ship stations.

คำถามที่ 27/50

90:00 นาที

For general communications purposes, simplex frequencies are:

A. Normally used with public coast stations for routine telephone communications.

B. Normally used between ship stations as well as public coast stations simultaneously.

C. Normally used with public coast stations for routine SITOR (NBDP) communications.

D. Normally used between ship stations and private coast stations or for ship-ship communications.

คำถามที่ 28/50

90:00 นาที

An ITU simplex channel frequency assignment is defined as:

A. Transmit and receive frequencies must be identical.

B. Transmit and receive frequencies must be different.

C. Transmit and receive frequencies may be different, depending on whether communications are ship-shore or ship to ship.

D. Transmit and receive frequencies are different regardless of emission mode.

คำถามที่ 29/50

90:00 นาที

Which of the following is a valid 22-MHz ITU Channel?

A. HF Ch-2206

B. VHF Ch-22

C. Ch-22A VTS

D. Ch-70 (DSC only)

คำถามที่ 30/50

90:00 นาที

What is a potential danger of using the manufacturer’s database to set up for operations using MF-HF ITU frequency assignments?

A. All manufacturer’s frequency databases are required to be standardized & accurate so that there is no danger.

B. Using the manufacturer’s frequency database to setup the transceiver typically takes longer and is more prone to error than a manual setup.

C. Different manufacturers use different database numbering systems to incorporate the ITU assignments into the transceiver and therefore a potential for confusion exists.

D. Using the manufacturer’s frequency databases ensures that the transceiver is always restricted to the vessel’s licensed frequencies so that there is no danger.

คำถามที่ 31/50

90:00 นาที

The proper sequence of channel spacing from narrow to widest is:

A. SSB voice, SITOR (NBDP), VHF-FM voice.

B. SITOR (NBDP), SSB-voice, VHF-FM voice.

C. VHF-FM voice, SITOR (NBDP), SSB-voice.

D. SITOR (NBDP), VHF-FM voice, SSB-voice.

คำถามที่ 32/50

90:00 นาที

The proper sequence of emissions corresponding to the sequence AM-Voice DSB, SSB-Voice without carrier, USB-Voice with carrier and FM-Voice, is:

A. A3E, H3E, J3E, F3E.

B. J3E, H3E, A3E, F3E.

C. H3E, A3E, J3E, F3E.

D. A3E, J3E, H3E, F3E.

คำถามที่ 33/50

90:00 นาที

What is the best source of information to find changes or additions to the routine communications frequencies of a Commercial Radio Station?

A. GMDSS Master Plan of Shore-Based Facilities.

B. ITU List of Coast Stations and Special Service Stations. (List IV)

C. FCC Part 80, Subpart W Coast Radio Stations.

D. ITU List of Ship Stations and Maritime Mobile Service Identities. (List V)

คำถามที่ 34/50

90:00 นาที

To make a call to another vessel requesting voice communications regarding important company business, the GMDSS operator should:

A. Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, J2B emission and transmit the properly formatted DSC call.

B. Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, J3E emission and transmit the properly formatted DSC call.

C. None of these answers is correct.

D. Select Urgency priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.

คำถามที่ 35/50

90:00 นาที

Which of the following acronyms refers to a communications system that does not use ARQ and/or FEC modes?

A. NAVTEX

B. SITOR (NBDP)

C. HF MSI

D. SART

คำถามที่ 36/50

90:00 นาที

The acronym SITOR (NBDP) stands for:

A. Simplified Telephony Over Radio

B. Simplex TELEX Over Radio

C. Simplified TELEX Over Radio

D. Simplex Telephony Over Radio

คำถามที่ 37/50

90:00 นาที

Which statement best defines the SITOR (NBDP) acronym "BFEC"?

A. Error correction for one-way TELEX broadcasts of weather or navigation information.

B. Error Correction when 2 stations are in direct & phased telephone communications with each other.

C. Error Correction when 2 stations are in direct & phased TELEX communications with each other.

D. Error correction when 1 station sends a one-way TELEX to a single other station.

คำถามที่ 38/50

90:00 นาที

When placing a TELEX call to a Coast Station, you should always:

A. Choose the closest station.

B. Tune the transmitter on another frequency.

C. Wait until the coast station sends his traffic list.

D. Make sure the frequency is not occupied with normal traffic.

คำถามที่ 39/50

90:00 นาที

What is the best method for a GMDSS Radio Operator to determine which SITOR (NBDP) station to contact for the purpose of sending a chargeable message or cable?

A. Listen to each station's “free signals” and call the strongest station.

B. Listen to each station's voice announcement and determine which channel(s) will be monitored.

C. Listen to each station's MSI broadcast to determine which public correspondence station to contact.

D. Listen to the U.S. Coast Guard's traffic list to determine which Coast Guard station will handle commercial traffic.

คำถามที่ 40/50

90:00 นาที

Which statement is correct regarding HF SITOR (NBDP) under GMDSS?

A. Distress communications other than directly to the Coast Guard or other coast stations on the channels that they normally guard, should be in the broadcast SSB mode.

B. Safety communications by direct-printing telegraphy should be in the ARQ mode when communicating with the U.S. Coast Guard or other coast stations on channels that they normally guard.

C. The ARQ mode may not be used subsequently to the FEC mode even when it is advantageous to do so.

D. Distress communications other than directly to the Coast Guard or other coast stations on the channels that they normally guard, should be in the broadcast FEC or SSB mode.

คำถามที่ 41/50

90:00 นาที

A manual ship-ship ARQ message would typically begin with what sequence of ARQ procedures?

A. Initiate call with CS selcal, observe exchange of answer-backs (WRU-AAB), send message.

B. Initiate call with ship selcal, enter “HERE IS” then “WRU” commands and send message.

C. After phasing with the other vessel, observe exchange of answer-backs (WRU-AAB), send message and then KKKK to end the transmission.

D. After phasing with the other vessel then send GA+? to determine if they are ready to receive your message.

คำถามที่ 42/50

90:00 นาที

Which automatic TELEX command should be sent by a ship station during SITOR (NBDP) operations to properly address a weather report to the national weather authority?

A. WX+ followed by the text of the report.

B. OBS+ then MSG+ to indicate weather report.

C. OBS+ and then send the weather report.

D. GA+? then OBS+ and then send the weather report.

คำถามที่ 43/50

90:00 นาที

The sequence BFEC, SFEC, ARQ best corresponds to which of the following sequences?

A. One-way communications to a single station, one-way communications to all stations, two-way communications.

B. One-way communications to all stations, two way communications, one-way communications to a single station.

C. One-way communications to all stations, one-way communications to a single station, two way communications.

D. Two way communications, one-way communications to all stations, two-way communications.

คำถามที่ 44/50

90:00 นาที

If the vessel is beyond range of NAVTEX broadcasts and the Inmarsat-C system fails, the GMDSS operator must:

A. Select 518 kHz ARQ TELEX on the MF/HF console to receive MSI.

B. Request repairs of the Sat-C system and wait until within range of NAVTEX.

C. Select 518 kHz FEC TELEX on the MF/HF console to receive MSI.

D. Select an HF MSI frequency and FEC TELEX mode to receive MSI.

คำถามที่ 45/50

90:00 นาที

If the vessel is experiencing atmospheric interference with NAVTEX broadcasts, especially in the tropics, the GMDSS operator should:

A. Select one of the 8 HF MSI frequencies and set-up the transceiver in FEC TELEX mode.

B. Select one of the 6 HF MSI frequencies and set-up the transceiver in ARQ TELEX mode.

C. Select one of the 6 MF MSI frequencies and set-up the transceiver in FEC TELEX mode.

D. Select the MF MSI frequency dedicated to tropical MSI and set-up the transceiver in FEC TELEX mode.

คำถามที่ 46/50

90:00 นาที

Why must the GMDSS operator be able to set-up FEC & ARQ modes and differentiate between them?

A. The proper mode of SFEC must be selected for reception of HF MSI and ARQ selected for initial follow-on TELEX communications in a Distress situation

B. The proper mode must be selected for follow-on TELEX communications in a Distress situation and for the reception of HF MSI.

C. The ARQ TELEX mode must be selected for follow-on TELEX communications in a Distress situation and the BFEC TELEX mode selected for reception of HF MSI.

D. The BFEC TELEX mode must be selected for follow-on TELEX communications in a Distress situation and the ARQ TELEX mode selected for reception of HF MSI.

คำถามที่ 47/50

90:00 นาที

What would be the most appropriate HF bands for communicating from San Francisco to Taiwan or the Philippines?

A. 12 MHz during daylight at each end and 2 MHz when dark at each end.

B. 8 MHz during daylight hours and 16 MHz during darkness.

C. 6 MHz during daylight hours and 8 MHz during darkness.

D. 16 or 22 MHz when daylight at each end and 8 MHz when dark at each end.

คำถามที่ 48/50

90:00 นาที

At mid-day in the summer, what would be the best choice in attempting to communicate, using SITOR (NBDP) with a shore station some 1800 miles distant?

A. VHF-FM

B. Lower HF bands

C. Higher HF bands

D. MF

คำถามที่ 49/50

90:00 นาที

Which of these would not be a bad outcome of an Urgency DSC call to all vessels specifying an alternate TELEX frequency & emission that cause your transceiver to automatically switch?

A. The DSC controller decoded the contents of the DSC call and the requested frequency is not on the DUS table/placard but is in the marine band frequencies in the J2B emission.

B. The DSC controller decoded the contents of the DSC call and the requested frequency is on the DUS table/placard in the J3E emission.

C. The DSC controller decoded the contents of the DSC call and the requested frequency is on the DUS table/placard in the J2B emission.

D. The DSC controller decoded the contents of the DSC call and the requested frequency is not on the DUS table/placard, is not in the marine band or the other vessel requested a J3E emission.

คำถามที่ 50/50

90:00 นาที

An incoming DSC Distress alert on 8414.5 kHz will have what result?

A. The DSC controller will emit both an audible and visual alarm.

B. The particulars of the alert may be printed out.

C. The Distress information contained in the alert will be sent to the data directory.

D. All of these answers would typically occur.

คุณยังตอบคำถามไม่ครบ : 50 ข้อ จาก 50 ข้อ

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