Where may survival craft portable VHF radiotelephones be operated?
A. Between survival crafts.
Between survival craft and ship.
C. Between survival craft and rescue unit.
D. All of the above
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Which statement is not true regarding the SART?
A. Responds to interrogations by a vessel's X-band radar.
B. Transmits on the 9 GHz band reserved for navigational radar.
C. Operates in con unction with a vessels S-band radar.
D. Transmits a distinctive code for easy recognition.
Which of the following EPIRBs is most likely to transmit a distress alert signal?
A. 9 GHz EPIRBs.
B. Ch 16 EPIRBs.
C. 406 MHz EPIRBs
D. 121.5 / 243 MHz EPIRBs.
Which of the following statements is true?
A. The SART can be auto-operated in vertical position sometimes.
B. The SART can be auto-operated in parallel position at any time.
C. The SART can be auto-operated under the water sometimes.
D. The SART can be operated in float-free position when combined with EPIRB
若要开发一个信息系统,需要经过七个步骤:①规划②设计③分析④ 实施⑤测试⑥开发⑦维护。这七个步骤排序正确的是: 【
A. ①②③④⑤⑥⑦
B. ①②③⑥④⑤⑦
C. ①③②⑥⑤④⑦
D. ①③②⑥④⑤⑦
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