TERNAV2 (MIDTERM)

Question 1

is said to be abeam of the ship, when it comes in line with perpendicular to the ship’s fore and aft centreline on any side of the vessel.

Answer 1

landmark or lighthouse

Question 2

Bearing of that lighthouse when abeam will be either

Answer 2

90° to the portside or 90° to the starboard side of ship’s heading (ship’s course) at that moment.

Question 3

The distance of that lighthouse at this moment (when abeam) is called _

Answer 3

beam distance

Question 4

and bearing is known as

Answer 4

‘beam bearing’

Question 5

BC —

Answer 5

Second bearing of light

Question 6

AD —

Answer 6

Course steered between observations

Question 7

AB = BC =

Answer 7

Distance run between first and second observations

Question 8

BC —

Answer 8

Distance from the light at the time of second observation

Question 9

Distance steamed between first and second observation is the

Answer 9

distance from observed object

Question 10

The procedure is similar to doubling the angle on bow.

Answer 10

Four-point bearing on the bow

Question 11

Distance from the object shall be the distance steamed between first and second observation

Answer 11

Four-point bearing on the bow

Question 12

This method also suffers from the disadvantages that distance from the object is only known when ship is already off that position.

Answer 12

Four-point bearing on the bow

Question 13

We use this process for estimating the distance abeam, at which the ship is going to pass any observed object.

Answer 13

Special angles on the bow

Question 14

gives the distance abeam from the object in advance, enabling us to take a decision regarding safe passing distance etc

Answer 14

Special angle method of estimating distance

Question 15

AD =

Answer 15

ship’s course steered

Question 16

Many ports have provided _to guide mariners safely into harbour, avoiding shoals and other dangers.

Answer 16

leading lights or shapes

Question 17

In places where such aids are not provided, the navigator may still be able to select a _ provided by the transit of natural features.

Answer 17

leading line

Question 18

When a suitable transit is not available a

Answer 18

single danger bearing may be taken from the chart

Question 19

is one of the easiest ways to ensure that your vessel and crew stay in safe water

Answer 19

Establishing a danger bearing

Question 20

The effect of wind on the course steered

Answer 20

Leeway

Question 21

The angle between the course steered and the course made good

Answer 21

Leeway

Question 22

is estimated by the navigator as so many degrees to port or starboard and necessary allowance made for it in computing the course to steer.

Answer 22

Leeway

Question 23

are designed mainly for solving Parallel Sailing and Plane Sailing without major calculations

Answer 23

Traverse tables

Question 24

For plane sailing, the tables are tabulated from

Answer 24

right-angled triangles and cover a distance of up to 600 miles, which is the limit for plane sailing.

Question 25

In _, the traverse tables are named from 0° to 45° at the top of the pages, and 45° to 90° at the bottom of the pages.

Answer 25

Norie’s Nautical Tables

Question 26

These figures of degrees are represented courses in

Answer 26

Plane Sailing and latitude in Parallel Sailing

Question 27

The figure of degree of each table is represented for

Answer 27

latitude

Question 28

The columns with the header D. Long. or D’Long., and Dep., which are normally printed in italics, are used to find the

Answer 28

Departure from a given Different of Longitude (D. Long)

Question 29

For _, these figures of degrees are the courses expressed in appropriate quadrants as _

Answer 29

plane sailing, cardinal compass.

Question 30

The three-figure notation (θ°) course is converted into a

Answer 30

quadrantal notation course (Ω°)