Maritime and Marine Marine Navigation and Charting 3

Question 1

What is 'dead reckoning' in marine navigation?

Accepted Answer

Estimating current position from a known fix using course, speed, and elapsed time

Answer

Navigation using sights on celestial bodies

Answer

Navigating by visual identification of landmarks and aids

Answer

Using radio direction-finding equipment to determine position

Question 2

What instrument is used to measure the altitude of celestial bodies above the horizon in celestial navigation?

Accepted Answer

Sextant

Answer

Compass

Answer

Chronometer

Answer

Barometer

Question 3

In celestial navigation, why is an accurate chronometer essential?

Accepted Answer

To provide accurate Greenwich Mean Time for calculating longitude

Answer

To measure the angle of the sun above the horizon precisely

Answer

To predict tidal changes at the vessel's destination

Answer

To synchronize the vessel's speed log with satellite data

Question 4

What is a 'Line of Position' (LOP) in navigation?

Accepted Answer

A line on a chart along which the vessel's position is known to lie based on a single observation

Answer

The projected track line drawn on a chart between two waypoints

Answer

The bearing taken from a vessel to a navigational aid

Answer

A course line connecting a departure point to a destination

Question 5

What effect does 'leeway' have on a vessel's navigation?

Accepted Answer

It causes lateral drift due to wind, creating a difference between heading and actual track

Answer

It increases hull speed by aligning wind and current forces

Answer

It creates a discrepancy between magnetic and true compass readings

Answer

It reduces GPS accuracy by introducing multipath signal errors

Question 6

When plotting a running fix, what must be done to the first Line of Position before combining it with the second?

Accepted Answer

Advance it along the vessel's course line for the distance traveled between observations

Answer

Rotate it to align with the current magnetic variation

Answer

Double the bearing angle to compensate for vessel movement

Answer

Convert it from a true bearing to a compass bearing

Question 7

Which celestial body is most commonly used for 'noon sights' in traditional celestial navigation?

Accepted Answer

Sun

Answer

Moon

Answer

Venus

Answer

Polaris