Which of the following is the most accurate...

Question 1 / 2707066636ee928f7522a1c519772

Question 1 of 2707066636ee928f7522a1c519772

Which of the following is the most accurate method of determining gyrocompass error while underway?

Question 1 of 27070

Which of the following is the most accurate method of determining gyrocompass error while underway?

🔍 Key Concepts

• Gyrocompass error as the difference between indicated gyro heading and a true direction reference • How magnetic variation and deviation affect comparisons between gyro and magnetic compasses • Using a celestial body's true azimuth as a precise reference for true north

💭 Think About

• Ask yourself: Which option uses a reference that is directly tied to true north rather than to magnetic north or to DR (dead reckoning) assumptions? • Consider which method depends the least on estimated factors such as current, leeway, or steering errors. • Think about how navigators use a sextant and sight reduction to get a very accurate true bearing of a star, sun, or planet—how could that help you check the gyrocompass?

✅ Before You Answer

• For each choice, decide whether the reference used is true, magnetic, or estimated. • Check which method would give you a single, clear numerical error (e.g., "gyro is X° high/low") at a specific moment. • Verify which option matches standard practice taught in terrestrial and celestial navigation for checking gyro error underway.

Question 1 of 27070

Which of the following is the most accurate method of determining gyrocompass error while underway?

Comparing the gyro heading with the magnetic compass heading

Determining from the chart the course made good between celestial fixes

Comparing the gyro azimuth of a celestial body with the computed azimuth of the body

It cannot be determined accurately at sea due to drift of unknown currents.

Question 1 / 2707066636ee928f7522a1c519772

Question 1 of 2707066636ee928f7522a1c519772

Which of the following is the most accurate method of determining gyrocompass error while underway?

Back

Question 1 of 27070

Which of the following is the most accurate method of determining gyrocompass error while underway?