39. 為避免干擾VHF CH16之通信安全，VHF特別規劃有兩個護衛頻道（guard band）護衛 CH16，此兩頻道之編號（CH）為何？ (A) 15/17 (B) 60/62 (C) 75/76 (D) 88/90

39. 為避免干擾VHF CH16之通信安全，VHF特別規劃有兩個護衛頻道（guard band）護衛 CH16，此兩頻道之編號（CH）為何？
(A) 15/17
(B) 60/62
(C) 75/76
(D) 88/90

答案：登入後查看
統計： A(91), B(18), C(407), D(23), E(0) #1558492

私人筆記 (共 1 筆)

nereus 814

2019/01/13

私人筆記#1217855

未解鎖

特高頻VHF 1. 121.5 ㎒：...

(共 473 字，隱藏中）

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9. All persons who are assigned duty as officer in charge of a watch or as a rating forming part of a watch and those whose duties involve designated safety, prevention of pollution and security duties shall be provided with a rest period of not less than:a minimum of 10 hours of rest in any 24-hour period; and77 hours in any 7-day period.The hours of rest may be divided into no more than two periods, one of which shall be at least 6 hours in length, and the intervals between consecutive periods of rest shall not exceed 14 hours.Parties may allow exceptions from the required hours of rest in paragraphs mentioned above provided that the rest period is not less than 70 hours in any 7-day period. 正常狀況下，休息時間可以分段，但不能超過幾個時段？ (A) 2個時段 (B) 3個時段 (C) 6個時段 (D) 7個時段

39. 為避免干擾VHF CH16之通信安全，VHF特別規劃有兩個護衛頻道（guard band）護衛 CH16，此兩頻道之編號（CH）為何？
(A) 15/17
(B) 60/62
(C) 75/76
(D) 88/90

私人筆記 (共 1 筆)

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