When the equation of time is taken from the...

Question 1 / 2707066636ee928f7522a1c5196d1

Question 1 of 2707066636ee928f7522a1c5196d1

When the equation of time is taken from the Nautical Almanac for use in celestial navigation, what is it used to determine?

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Question 1 of 27070

When the equation of time is taken from the Nautical Almanac for use in celestial navigation, what is it used to determine?

🔍 Key Concepts

• Equation of time and the difference between apparent (sun) time and mean (clock) time • How we find Local Apparent Noon (LAN) when doing a meridian passage sight • What kind of "time" is printed directly in the Nautical Almanac vs. what must be corrected

💭 Think About

• Ask yourself: does the equation of time convert clock time to time zone time, or does it adjust between sun time and mean time? • Think about the steps to find the time of meridian passage (LAN) at your longitude: where in that process does the equation of time come in? • Which of the choices would logically depend on the irregular motion of the Sun in the sky over the year, which is exactly what the equation of time corrects for?

✅ Before You Answer

• Verify which type of time the meridian passage page of the Nautical Almanac is referenced to, and how the equation of time modifies it • Check that zone time comes from longitude and standard time zones, not from the equation of time • Confirm whether sunrise times in the Nautical Almanac are already corrected, or if they require using the equation of time separately

Question 1 of 27070

When the equation of time is taken from the Nautical Almanac for use in celestial navigation, what is it used to determine?

Local mean time

The zone time

Time of local apparent noon

The sunrise

Question 1 / 2707066636ee928f7522a1c5196d1

Question 1 of 2707066636ee928f7522a1c5196d1

When the equation of time is taken from the Nautical Almanac for use in celestial navigation, what is it used to determine?

Back

Question 1 of 27070

When the equation of time is taken from the Nautical Almanac for use in celestial navigation, what is it used to determine?