9. Navigation

Question 0

For overall planning on a long cruise, navigators should select a chart with

Answer 0

a SMALL scale that shows a LARGE area

Question 1

The best binocular for use on a recreational vessel is

Answer 1

7 X 50

Question 2

1 minute of latitude equals

Answer 2

1 nautical mile

Question 3

Charts are being revised to use only the following datum for soundings

Answer 3

mean LOWER LOW water

Question 4

Which of the following measures distances north or south of the equator?

Answer 4

latitude

Question 5

Which scale of a chart should never be used for measuring distance?

Answer 5

LONGitude

Question 6

The direction of a course is the angle it makes with a

Answer 6

meridian

Question 7

You can find the amount of variation in your boating area by

Answer 7

looking at a compass ROSE on the chart of the area

Question 8

If you measure the direction of a course line from a chart meridian, you have a

Answer 8

true direction

Question 9

Variation is the difference between

Answer 9

True north and MAGNETIC north

Question 10

Deviation is a compass error caused by

Answer 10

magnetic influences aboard your vessel

Question 11

The technical term for the benchmark from which a marine chart’s vertical and horizontal measurements are made is

Answer 11

datum

Question 12

Direction can be determined on a Mercator chart by using the

Answer 12

compass rose

Question 13

A speed table is used to

Answer 13

determine speed from a tachometer reading

Question 14

The vertical datum of a chart

Answer 14

helps you know how much clearance there is under a bridge

Question 15

To correct a compass reading

Answer 15

add easterly variations

Question 16

Mercator projections are made by projecting the earth’s surface onto a

Answer 16

cylinder

Question 17

On a chart, shallow water is

Answer 17

light blue

Question 18

If you travel at a speed of 12 KNOTS for 10 MINUTES you will have gone how far?

Answer 18

2.0 Nautical miles

1 knot is 1 nautical mile per hour. 12 knots is a mile every 5 minutes

Question 19

In an area with a variation of 12 degrees E, your heading is 130 degrees by your compass. The DEVIATION for this heading is 3 degrees W. What is your true heading?

Answer 19

139 degrees. 130 degrees, plus the VARIATION of 12 degrees EAST, MINUS the 3 degree DEVIATION WEST