🔍 Key Concepts

• Relationship between degrees of arc and time in celestial navigation • How many degrees of longitude correspond to 1 hour of time • Converting minutes of arc into seconds of time

💭 Think About

• First, figure out how many minutes of time correspond to 1° of arc, using the fact that 15° equals 1 hour. • Convert 1° 53' entirely into minutes of arc, then use your conversion factor (arc → time) to find total seconds of time. • Finally, change your total seconds of time into minutes and seconds and compare with the choices.

✅ Before You Answer

• Confirm that you are using the standard relation: 15° of arc = 1 hour of time. • Double-check your conversion from 1° 53' into total minutes of arc before applying the time factor. • After getting total seconds of time, be careful when converting to minutes + remaining seconds so you don’t round incorrectly.