USCG Exam PracticeGPS and electronic navigation
According to Bowditch Ch. 1 §101, modern voyages treat electronic navigation in which role relative to other methods such as dead reckoning, piloting, and celestial?
- A. As a supplementary check used only when celestial observations are unavailable
- B. As the method of last resort when all other systems have failed
- ✓ As the principal real-time reference, with the other methods serving as cross-checksCorrect
- D. As equivalent in priority to piloting when operating in confined waters
Why C is correct
Bowditch Ch. 1 §101 states that modern voyages combine all four primary navigation methods with electronic navigation as the principal real-time reference and the others as cross-checks. Celestial navigation is described in Bowditch Ch. 15 §1501 as the backup of last resort, not electronic navigation.
Cited:Bowditch Ch. 1 §101