Navigation General · Electronic Nav — ECDIS Safety Contour
The ECDIS 'safety contour' set by the navigator is used to:
- ASeparate safe from unsafe water and trigger an alarm if the vessel may cross it✓ Correct
- BAdjust screen brightness
- CShow weather fronts
- DSet the clock
Explanation
The safety contour divides water the vessel can navigate from water that is too shallow. ECDIS highlights it and alarms when the planned route or the vessel's position approaches/crosses it, a key anti-grounding function.
Authority: SOLAS V/19; IMO ECDIS performance standards
Practice the full Navigation General bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Navigation General questions
- Dead Reckoning
A vessel departs a known position at 0800 on course 090°T at 12 knots. What is the DR position at 1100?
- Time-Speed-Distance
Using the 60 D = S × T formula, how long will it take a vessel traveling at 15 knots to cover 45 nautical miles?
- Time-Speed-Distance
A vessel travels 90 nautical miles in 6 hours. What is the vessel's speed?
- Dead Reckoning
Which of the following is the best definition of a Dead Reckoning (DR) position?
- Set & Drift
A vessel steers 000°T at 10 knots for 2 hours. The observed position shows the vessel is 4 nm east of the DR position. What is the set and drift of the current?
- Set & Drift
A current has a set of 225°T and a drift of 2 knots. Over 3 hours, how far and in what direction will this current displace a vessel from its DR position?