C. To provide an additional speech path which may be used to communicate while the first channel is engaged in active communications.
D. To provide for an emergency working frequency. A
240. What is the purpose of including a string of five periods (“…..”) in an INMARSAT-B telex message? A. This is an ellipse that is used to signify that certain redundant text has been deleted.
B. This instructs the coast earth station to automatically disconnect the telex connection and server the satellite communications.
C. A string of five periods will not affect an INMARSAT-B telex transmission.
D. This instructs the coast earth station to automatically disconnect the telex connection and keep the shipboard unit in communications with the satellite.
D
241. Which one of the following equipment is intended to be interfaced with an INMARSAT-B unit? A. The PPI of radar. B. Digital Selective Calling controller. C. Auto alarm generator. D. Ship wide signal distribution panel. C
242. Which of the following conditions can render INMARSAT-F communications impossible?
A. An obstruction, such as a mast, causing disruption of the signal between the satellite and the SES antenna when the vessel is steering a certain course.
B. A satellite whose signal is on a low elevation, below the horizon. C. Travel beyond the effective radius of the satellite. D. All of these. D
243. Which INMARSAT system supports facsimile communications?
A. Standard-F. B. Standard-C, ship to shore and shore to ship. C. Standard-B. D. NBDP. A
244. Which INMARSAT system supports facsimile communications?
A. Standard-C, ship to shore and shore to ship. B. COSPAS-SARSAT. C. Standard-B. D. NBDP.
C
245. Which INMARSAT system supports HSD communications?
A. Standard-C, ship to shore and shore to ship. B. COSPAS-SARSAT. C. Standard-F. D. NBDP.
C
246. Which satellite-based service provides global telephone, facsimile and HSD communications? A. INMARSAT Standard-C. B. Standard-F C. SafetyNET D. DSC. B
247. What is the INMARSAT Standard-C Service Code for automatic service?
A. 0. B. 00. C. 01. D. “0” or “00”, depends on the mode of the terminal. D
248. What is the INMARSAT Standard-B Service Code for automatic service? A. AA. B. 11. C. 01. D. 00. D
249. What type of equipment can be interconnected to an INMARSAT Standard-C SES?
A. Computer systems and Facsimile equipment. B. Autopilot and ship navigation equipment. C. Ship’s intercom. D. None of these.
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D
250. What is the process by which an individual vessel’s licensed SES equipment is approved by INMARSAT for access to the system?
A. Type Acceptance. B. Type Approval. C. Commissioning. D. Licensing under OCC.
C
251. Which one of the following statements concerning INMARSAT-C is true?
A. Voice calls through INMARSAT-C are more expensive than telex calls through the same system. B. A vessel may send and receive fax messages through INMARSAT-C.
C. A vessel can establish voice communications through INMARSAT-C on a dedicated channel. D. Telex messages can be sent or received through INMARSAT-C. D
252. Which one of the following statements concerning INMARSAT-C is true? A. Telex communications are conducted with real-time connectivity.
B. Two-way real-time telex communications can exist with prior arrangement. C. Telex messages are delivered on a store-and-forward basis.
D. Fax messages can be both sent and received through INMARSAT-C. C
253. How are charges calculated for a ship-to-shore telex message sent by INMARSAT-B? A. Charges begin when the vessel being called responds with its answerback. B. Charges are determined by the size of the telex message. C. Charges for a telex call are about one half that of a voice call. D. Charges for all calls are the same, regardless of their mode. A
254. Which statement is true regarding the ship to shore communications via INMARSAT-C? A. This utilizes ARQ mode transmissions from the ship to the shore station. B. This utilizes packet oriented type protocol over the satellite. C. This utilizes ARQ mode over the satellite. D. This utilizes real-time signaling. B
255. It is possible to transmit all of the following types of media via INMARSAT Standard-C from a vessel except the following?
A. Telex. B. Fax. C. Voice. D. Comtex mail and x.400 data services. C
256. How are ship-to-ship charges computed on a Telex message via INMARSAT Standard-C terminals when both are operating in the same ocean region?
A. Charged at a rate per 256 bits.
B. Charged at a per-minute rate which is the same as the voice traffic rate.
C. Charged at a per-minute rate which is the same as those of Standard-B messages. D. Charged at a per-minute rate which is twice the applicable ship to shore rate. A
257. Which functions may the holder of a GMDSS general operator Licensed not perform on the INMARSAT-C equipment?
A. Optimize performance by adjusting the transmitter EPIRP (Effective Isotropic Radiated Power). B. Maintain the antenna clear of soot, paint, etc. C. Logon; traffic and logoff functions.
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D. Entry of position data and selection of CES. A
258. Which maintenance functions may not be performed on an INMARSAT-F station by the holder of a GMDSS general operator License?
A. Replace consumable items such as printer paper and ribbons. B. Maintain the antenna clear of soot, paint, etc. C. Replace a defective fuse.
D. Supervise the painting of the antenna. D
259. Which system can be defined as a small, lightweight terminal designed for two-way message communication via satellite, using an omnidirectional antenna?
A. INMARSAT-A SES. B. HF SITOR. C. Portable lifeboat Radio D. INMARSAT-C. D
260. What should be performed before powering down the shipboard MES terminal?
A. First turn off the printer, then the computer, then the MES. B. Contact the LES to check out of the system.
C. Log out the system. D. Always turn off the MES first. C
261. The Mobile Number which identifies the Standard-C SES is composed of: A. The vessel’s call sign followed by the SEL CALL number. B. Nine Digits.
C. The Selective Calling Digits. D. Five unique audio tones. B
262. An arrangement of digits similar to 123456789 WABC X would be:
A. A vessel’s selective call. B. A vessel’s U.S. Coast Guard registration number. C. A vessel’s Mobile Registration Number. D. A vessel’s answerback. D
263. All the followings in connection with Spot beam are correct, except:
A. A concentrated area offering coverage within the global footprint for particular regions in the world. B. It is selected by INMARSAT-B system. C. It is used in INMARSAT-F system. D. It is used in INMARSAT-C system. D
264. All the followings in connection with Special access codes are correct, except: A. The abbreviation is SAC.
B. When operators onboard desire to send E-mail to subscribers ashore with INMARSAT-C terminals, Special access codes are often required.
C. When operators onboard desire to send E-mail to subscribers ashore with INMARSAT-B terminals, Special access codes are often required.
D. The digits of SACs are variable. C
265. The INMARSAT council confirmed that distress and safety calls:
A. Would not be charged for the use of satellites. B. Would not be charged for the use of land line.
C. Would be reduced charges for the use of land line. D. Would be reduced charges for the use of satellites.
A
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266. It was agreed that reduced charges will apply for:
A. Ship to shore medical advice communications via code 32. B. Ship to shore medical advice communications via code 38.
C. Ship to shore medical assistance for grave and imminent danger communications via code 38. D. Ship to shore medical assistance for grave and imminent danger communications via code 32. A
267. Which Standard-C communications are provided at no charge by the LES? A. Emergency communications. B. Traffic Lists. C. Vessel position information to ship owners. D. GPS relays. A
268. Which system is most likely to be affected, for any cause, by a major change in the course steered by the ship?
A. Standard-C SES. B. Standard-F SES. C. Standard-B SES. D. Both Standard-b SES and F SESs.
D
269. How is ship to shore transmission of a distress priority message in most SESs initiated? A. By provision of a “distress button” or code in the SES.
B. By including the priority code in the preamble of the Telex message.
C. By including the priority code in the dialed number in voice communications. D. By initial voice contact with the Rescue Coordination Center. A
270. What is the Shore-ID Code in INMARSAT-C services for the Beijing Earth Station for a vessel operating in the IOR?
A. 300. B. 310. C. 311. D. 211. C
271. In which area(s), can you contact Beijing Earth Station for INMARSAT-C services? A. AOR-W. B. AOR-E. C. IOR and POR. D. All of these. D
272. What is the Shore ID Code in INMARSAT-B services for the Beijing Earth Station for a vessel operating in the IOR?
A. 200. B. 311. C. 686. D. 868. D
273. What is the Shore ID Code in INMARSAT-C services for the Beijing Earth Station for a vessel operating in the POR?
A. 200. B. 686. C. 868. D. 211. D
274. Which Earth Station might a vessel use economically to contact subscribers ashore of P.R.C. if operating off the Pacific Coast?
A. Goonhilly. B. Southbury. C. Beijing. D. KPH (San Francisco, CA). C
275. Which Earth Station might a vessel use economically to contact subscribers ashore of Singapore. if operating in Southern China Sea?
A. Goonhilly. B. Southbury. C. Beijing. D. Sentosa. D
276. What billing services are available through Standard-F SES in telephone mode?
A. Credit card calls. B. Person-to-person calls. C. Collect calls. D. All of these.
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D
277. What is the meaning of a Subscriber’s number?
A. The selective calling number assigned to the vessel. B. The number assigned to a subscriber’s telephone, Telex, etc.
C. The number assigned to the vessel by the U.S. Coast Guard. D. The station’s call sign. B
278. A vessel is operating in the Western Atlantic. To initiate a ship-to-shore telephone contact to a shoreside party in Dalian city of China, whose number is 8472-9640, through Beijing Earth Station, using automatic service by telephone, a valid INMARSAT dialing sequence is?
A. #086041184729640#. B. #08641184729640#. C. #008641184729640#. D. #0086041184729640#.
C
279. A vessel is operating in the Western Atlantic. To initiate a ship-to-shore TLX contact to a shoreside party in Dalian city of China, whose number is 860528, through Beijing Earth Station, using automatic service by TLX machine, a valid INMARSAT dialing sequence is?
A. 086411860528+. B. #085860528#. C. #0086411860528#. D. 0085860528+.
D
280. A vessel loses INMARSAT-B SES operation after a large course change. This could be caused by which of the following?
A. System loses gyro follow-up or a gyro system malfunction.
B. Shadowing of the SES antenna by clouds or other weather formations. C. Misalignment of the shadow correction filter. D. None of these. A
281. Which statement is correct regarding a method that a vessel experiencing problems with shadowing of the INMARSAT-F SES antenna by an on-board obstruction could use to attempt reliable communications?
A. Change course to make the communication. B. Change the Coast Station ID programming. C. Install a shadow correction filter.
D. Switch from Telex to Voice mode which requires a lower signal strength for proper operation. A
282. Which mode of INMARSAT Standard-B communications may be possible with a lower received signal strength?
A. Fax. B. Telex. C. Voice Communications, compandors off. D. Voice Communications, compandors on.
B
283. Which mode of INMARSAT Standard-B communications is usable nearest the outer edge of the satellite coverage area?
A. Telex. B. Fax, due to its lower speed. C. Voice Communications, due to the use of compandors. D. SITOR, due to error correction. A
284. What immediate remedy can be used to correct shadowing of the satellite signal by a shipboard obstruction?
A. Change the ship’s course. B. Relocate the mast or other obstruction. C. Raise the transmit power level. D. Increase the receiver gain.
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