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Navigation Rules Practice Test

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You are on a vessel that the Secretary has determined cannot comply with the spacing requirement for masthead lights. What is required in this situation?
  A. The vessel must carry only the lights that comply with the rules; the others may be omitted. 
  B. The vessel's lights must comply as closely as possible.
  C. The vessel must be altered to permit full compliance with the rules.
  D. An all-round light should be substituted for the after masthead light and the stern light.