Gen Nav / Electronic Nav

Question 1

List the 3 types of radio navigation warnings

Answer 1

1. NAVAREA warnings
2. Coastal warnings
3. Local warnings

Question 2

What is the reference to find distances to other places?

Answer 2

Admiralty Distance Tables

Question 3

Describe the canal effect

Answer 3

Forces on a ship are intensified in a canal because water is both shallow and confined
- Suction can pull ship to one side (nearest to port or starboard bank)

Question 4

Define eddies

Answer 4

Circular movements of war

Question 5

Define Eddies

Answer 5

• Circular movements of water
• Common near major ocean currents
• Last for over 12 months
• Can be warm or cold

Question 6

What is Datum?

Answer 6

A coordinate system and a set of reference points used to locate places on the earth.

Question 7

What is WGS?

Answer 7

World Geodetic System, is a geodetic system used by GPS standard for use in chartography, geodesy, and navigation.

GPS is referenced to WGS 84

Question 8

What is two electronic methods for recording bridge activity?

Answer 8

Digital Voice Recording System (DVRS)

NDS Voyage Data

Question 9

What is the publication for the conduct of ships at sea?

Answer 9

Vol 4 of BR45

Question 10

What factors make up CPA?

Answer 10

Range, Bearing and Time

Question 11

What does the loom of a light mean?

Answer 11

The glow observed from a light below the horizon or hidden behind an obstacle. It is due to atmospheric scattering.

Question 12

What cardinal marker has two inverted triangles?

Answer 12

West Cardinal Marker

Question 13

What type of marker has two red black balls, with a black line over a red line?

Answer 13

Isolated Danger Mark

Question 14

What type of marker has a red ball on top a white and red stripped marker?

Answer 14

Safe Water Mark

Question 15

What type of marker has a yellow X on top of a yellow marker?

Answer 15

Special mark

Question 16

What type of mark has a yellow + on top of a marker with blue and yellow stripes?

Answer 16

Emergency wreck marking buoy

Question 17

What is the transfer for an alteration of course referring to?

Answer 17

Lateral distance moved at right angles to the original course.
- First measurement usually plotted

Question 18

What does the intensity of a light mean?

Answer 18

The intensity of a light is its brightness

- Expressed in candelas or converted to nominal range

Question 19

What publication is for exercises using navigation?

Answer 19

BR45 Vol 5

Question 20

What is BR67 Vol 10 for?

Answer 20

Helmsmanship

Question 21

What is BR67 Vol 2 for?

Answer 21

Anchoring

Question 22

What is BR45 Vol 6 for?

Answer 22

Ship Handling

Question 23

What is BR45 Vol 7 for?

Answer 23

Handbook for the Navigators Yeoman

Question 24

What is BR67 Vol 4 for?

Answer 24

Towing

Question 25

List the three AFT publications and what each one contains?

Answer 25

AFTP 1 - Fleet general orders AFTP 4 - Fleet training instructions AFTP 9 - Australian Submarine Search and Rescue Instructions

Question 26

What does the FAS and FXP stand for and mean?

Answer 26

Fleet Activity Schedule - fleet units programs Fleet Exercise Program - fleet weekly serials

Question 27

What does AFTP 4 contain?

Answer 27

Fleet Training Instructions

Question 28

What is BR67 Vol 6 for?

Answer 28

Replenishments at Sea (RAS)

Question 29

What is BR67?

Answer 29

Manual of Seamanship

Question 30

BR45 Vol 1?

Answer 30

Principles of Navigation

Question 31

BR45 Vol 2?

Answer 31

Astro navigation

Question 32

What is contain in NP735?

Answer 32

IALA Buoyage System

Question 33

What is BR45 Vol 9?

Answer 33

Operational Navigational Techniques

Question 34

What is BR45 Vol 3 for?

Answer 34

Navigation equipment and systems

Question 35

What does MARPOL do?

Answer 35

International Convention for the prevention of pollution from ships

Question 36

Manual of navigation?

Answer 36

BR45

Question 37

Who is the CN?

Answer 37

Vice Admiral Mark Hammond

Question 38

List the two navigation and seamanship publications

Answer 38

BR45 Vol 1-9 - Manual of navigation BR67 - Manual of seamanship

Question 39

Define chart datum?

Answer 39

A reference from which measurements are made? - A level so low that the tide will not frequently fall below it. - At or near level of lowest astronomical tide (LAT) Level below chart datum is known as the ‘charted depth’

Question 40

List the four tide levels and datum’s?

Answer 40

MHWS - 2 successive high waters during spring tides (MHHW) MHWN - 2 successive high waters during neap tides (MHLW) MLWN - 2 successive low waters during neap tides (MLHW) MLWS - 2 successive low waters during spring tides (MLLW)

Question 41

State the predicted and average tidal level and datum

Answer 41

HAT/LAT - highest and lowest levels which can be predicted to occur under average met conditions MSL - Average levels of the sea surface over a long period or the average level that would exist in the absence of tides

Question 42

Components of tidal flow?

Answer 42

Tidal stream and current

Question 43

Define tidal stream?

Answer 43

Periodic horizontal reversing movements of the water accompanying the vertical rising and falling of tides.

Question 44

Define current?

Answer 44

- Non tidal movements of water - May flow steadily at all depths in the ocean - May have both horizontal and vertical components