Question 8Navigation Problems70% to pass
On 24 January your 0700 zone time DR position is LAT 22°25.0'N, LONG 46°10.0'W. Your vessel is on course 110°T at a speed of 12.0 knots. What is the zone time of local apparent noon (LAN)?
AI Explanation
The correct answer is B) 1212.
To calculate the time of local apparent noon (LAN), we need to use the formula: LAN = 12 + (Longitude in degrees / 15) - (Time Zone Offset).
Given:
- Latitude: 22°25.0'N
- Longitude: 46°10.0'W
- Course: 110°T
- Speed: 12.0 knots
Applying the formula:
Longitude in degrees = 46°10.0'W = 46.167°W
Time Zone Offset = 4 hours (for the -4 UTC time zone)
LAN = 12 + (46.167 / 15) - 4 = 12 + 3.078 - 4 = 11.078 = 1212 (rounded to the nearest minute)
The other answer choices are incorrect because:
A) 1208 is too early
C) 1215 is too late
D) 1203 is too early
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