At 0915 zone time on 7 April you depart San...

Question 1 / 2066636eea28f7522a1c51a987

Question 1 of 2066636eea28f7522a1c51a987

At 0915 zone time on 7 April you depart San Francisco, LAT 37° 48.5' N, LONG 122° 24.0' W (ZD +8). You are bound for Kobe, LAT 34° 40.0' N, LONG 135° 12.0' E, and you estimate your speed of advance at 17 knots. The distance is 4,819 miles. What is your estimated zone time of arrival at Kobe?

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66636eea28f7522a1c51a987

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🔍 Key Concepts

• Time = Distance ÷ Speed to find total steaming time in hours • How to convert between zone time (ZT) and Greenwich Mean Time (GMT/UT) using the zone description (ZD) • How to cross the International Date Line and adjust date and time zone when going from west longitude to east longitude

💭 Think About

• First, compute how many hours it will take to travel 4,819 miles at 17 knots, then convert any decimal hours into hours and minutes. • Convert the San Francisco departure time from local zone time (ZD +8) to GMT. Then add the steaming time to find GMT at arrival. • From the GMT at arrival, apply Kobe’s approximate time zone (ZD) and remember you are crossing the Pacific and the International Date Line—decide whether to add or subtract a day when changing from W to E longitudes.

✅ Before You Answer

• Be precise with the calculation: Time (hours) = 4,819 ÷ 17, and convert the decimal correctly to minutes. • Confirm that San Francisco’s zone description is +8 and determine Kobe’s correct ZD based on 135°E (how many 15° time zones from the prime meridian?). • After adjusting from GMT to Kobe ZT, double‑check the calendar date and make sure the hour and date change are consistent with crossing the International Date Line.

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Question 1 / 2066636eea28f7522a1c51a987

Question 1 of 2066636eea28f7522a1c51a987

Back

Question 1 of 20

66636eea28f7522a1c51a987

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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