CHECK YOUR PROGRESS (Pdf view) NAME:

NAVIGATION 1 AUS 802 Wilsons Prom. Answers

 

Use chartlet and the deviation card provided at the end of this file.

Question 1 (10 Marks)

Plot the following positions:

Position 1 Lat 39 17.0 S Long 146 03.8 E

Position 2 Lat 39 08.0 S Long 146 14.8 E

Then find:

a.     the true course to steer from Position 1 to Position 2

b.     the time taken to steam from Position 1 to Position 2 at a speed of 6.25 knots

c.     the ETA at Position 2 if the time of departure from Position 1 was 2245 on 1st April

 

Question 2 (10 Marks)

South East Point, Wattle Island and the centre of Rodondo Island were all at a radar range of 3 miles. Fix the ships position and find the compass deviation if South East Point bore 020 by ships compass. Use a Variation of 13E, but do not use the Deviation Card provided.

 

Question 3 (15 Marks)

At 1100 the summit of Norman Is (96) bore 050.5M and Citadel Is. Lt bore 097M.

The vessel then steered a course of 127M at 5 knots.

At 1230, Cleft Is (113) (Skull Rock) bore 068M, and the radar range of its nearest edge was 7.2 miles.

Use a Variation of 13E in this question.

Now do the following:

a.     plot and record the 1230 DR position

b.     plot and record the 1230 Fix position

c.     find the course made good between 1100 and 1230

d.     find the speed made good between 1100 and 1230

e.     find the set drift and rate of the current experienced between 1100 and 1230

 

Question 4 (15 Marks)

At 1400 South East Point Light bore 278M, and the radar range of the nearest edge of South East Point was 6.0 miles.

Find the compass course to steer to pass 1 mile to the north of Forty Foot Rocks, allowing for a current setting 130T at a rate of 1.5 knots and leeway of 10 from a strong northerly wind. The vessels speed is 6 knots.

Also calculate the Course Made Good, the Speed Made Good, and the E.T.A. when abeam of the summit of Rodondo Is

Use the Deviation Card provided and a Variation of 13E.

 

Question 5 (15 Marks)

At 2115 in calm conditions and no current, steaming at 10 knots on a course of 217C, Cliffy Is. Lt. bore 267.5C. Later on at 2130, the light bore 333.5C. Using the running fix method, fix the ships position at 2130.

Then find the compass course to steer, and the required ships speed to reach a way point in Lat 39 07.5 S 146 30.0 E at 2306. Use the Deviation Card provided and a Variation of 13E.

 

Question 6 (10 Marks)

Using the tidal information provided at the internet site find the times and heights of the tides at Sydney on 1/6/08.

 

Question 7 (6 Marks)

Using the Australian National Tide Tables graph and the tidal information calculate the height of the tide Eden at 0700 on Sunday 1/6/08

 

Question 8 (4 Marks)

Find the under keel clearance of a vessel drawing 3 metres passing over a charted depth of 2.5 metres. Height of tide 2 metres.

 

Question 9 (1 Mark)

What is the full meaning of the symbol


 

Question 10 (1 Mark)

What is the full meaning of the symbol


 

Question 11 (1 Mark)


What is the full meaning of the symbol

 

Question 12 (1 Mark)

What is the full meaning of the symbol


 

Question 13 (1 Mark)

What is the full meaning of the symbol


 

Question 14 (4 Marks)

Using the Geographical Range Table provided, find the range at which a ship with a bridge height of eye of 5 metres would raise Hogan Island Light 135 M on a dark clear night with perfect visibility is _________________ miles.

 

Question 15 (6 Marks)

Use the Luminous Range Diagram provided and Chart No. AUS 802. The luminous range of Citadel Island light if the meteorological visibility was 5 miles is _________________ .

 

Question 16 (10 Marks)

Name five publications you would refer to in planning a passage from Port Jackson in NSW to Mackay in Queensland.

 
 
 
 
 

 

Question 17 (2 Marks)

The soft iron bar which is commonly installed on the forward side of the compass binnacle in large vessels is known as the:

a.     Flinders Bar

b.     Quadrantal Corrector

c.     Kelvin Corrector

d.     Heeling Error Corrector

 

Question 18 (2 Marks)

A vessels automatic pilot steering device is best suited for use in:

a.     pilotage waters

b.     good visibility

c.     poor visibility

d.     open waters

 

Question 19 (2 Marks)

Tails below a depth sounders trace become larger when the:

a.     sea is rough

b.     vessel is over a hard seabed

c.     vessel is over seaweed

d.     vessel is in shallow water

 

Question 20 (2 Marks)

In GPS receivers an outage can last for periods up to:

a.     10 minutes

b.     30 minutes

c.     2 hours

d.     4 hours

 

Question 21 (2 Marks)

The term dithering as applied to GPS means that:

a.     the system is occasionally turned off

b.     there is a difference between chart datum and WGS

c.     the accuracy is reduced for civilian users

d.     the errors are abnormally large and variable

 

 

 


DEVIATION CARD 2 NAVIGATION

Magnetic Heading

Deviation

Ships Head By Compass

356

4W

000

015

5W

020

034

6W

040

056

4W

060

078

2W

080

099

1W

100

121

1E

120

143

3E

140

164

4E

160

186

6E

180

208

8E

200

230

10E

220

248

8E

240

266

6E

260

283

3E

280

301

1E

300

319

1W

320

338

2W

340

356

4W

360

Study example only- Not for navigation

 

 

   



Workings