are by great circle, as near as navigation permits, ... adjacent to the coast (see Admiralty Sailing Directions) to Selat Sunda. Selat Sunda-+ Aden 6.165

032-73 NAVIGATION DATASHEET Ql(l)

INDIAN OCEAN

10 JULY 2007

6.163.3

West and South coasts ofAustralia --+ Durban or Cape Town6.159 "Diaglam (6.157)

All routes throughout the year pass through or N of30· S, 100· E.

rFrom the S coast of Australia and Tasmania thisposition is approached through 34· 37' S, lIS" 08' E, 15miles S of Cape Leeuwin, and thence by rhumb line.

Although a great circle track from Tasmania direct to30· S, 100"E might appear preferable, it would onlysave about 20 miles, and adverse winds with head seaswould be more likely-:r.,

5

10

6.159.1From 30" S, 100· E, routes are seasonal as follows:October to April, for Durban, by great circle.For Cape Town:

Great circle to 35· S, 65· E, thence:Rhumb line to a landfall on Cape Recife, thence:Coastwise as at 6.56.

6.159.2May to September, routes are along the parallel of

30· S to Durban, continuing thence for Cape Town as at6.56.6.159.3

Distance in miles:

FTemantle Adelaide POTt PhillipfOT Melbourne

HobaTt

DurbanOctober-April

43505510May-September

44105570Cape Town(G) October-April

49706130May-September

5200636058005860

64206650

59806040

6600

6830...,.

• Port Phillip to Melbourne: 40 miles.(G) For distances to Cape Agulhas (15 miles S of), subtract 130 miles.

(a') For distance from Cape of Good Hope (145 milesS of), subtract 180 miles.

(G) For distance from Cape Agulhas (15 miles S of),subtract 130 miles.

Mombasa •..•Selat Sunda6.161Diagram (6.161)

From Mombasa the route passes 50 miles N ofSeychelles Group, thence through 4" 00' S, 73" 30' E,

Cape Town --+ New Zealand and PacificOcean6.160Diagram (6.160)

October to April, routes are as at 6.157 for Hobart asfar as 41" 30' S, 122"50' E, thence:

Either, great circle to 47" 50' S, 167" 50' E, ENE ofSnares Islands; Or, great circle passing close S ofTasmania to Cook Strait.6.160.1

If the shorter route to Hobart as at 6.157.1 is taken, itshould be left in 45" S, 130· E, and great circles followedthence to Snares Islands or Cook Strait.6.160.2

May to September, routes are as at 6.157.2 for ports E "of Adelaide as far as 35" 30' S, 1IS" 00' E, S of Cape"Leeuwin, thence:

Great circle to a landfall on South West Cape,Tasmania, thence:

Great circle to Snares Islands or Cook Strait.6.160.3

Distances in miles from Cape Town:

Oct-April: (6.160)Shorter route (6.160.1)

May-Sept

SnaTesIslands

6970(a')66S0(a')7240(G)

Cook Strait

( Wellington)7380(a')7100(a')7630(G)

30 passing 50 miles N of Chagos Archipelago, thence toSelat Sunda.

Distance: 3980 miles.

Mom.basa •..•Singapore35 6.162

Diagrams (6.161)From Mombasa the route is:

Through One and Half Degree Channel, thence:Through Selat Benggala, thence:

40 Through Malacca Strait to Singapore.Distances: 3990 miles.

Mom.basa +-+ North and west coasts ofAustralia

45 6.163DiagTam (6.161)

F~r Torres Strait and Darwin, in either direction,routes from Mombasa are either, as at 6.161 to SelatSunda, thence:

50 Through Java and Flores Seas, and Selat Wetar, asin Java, Flores and Banda Seas Route of 6.122.4;

6.163.1Or, 50 miles N of Seychelles Group, thence:

Through 4" 00' S; 73" 30' E, passing N of Chago55 Archipelago, thence:

Joining the Ocean Route of 6.122.2 in 11" 30' S,.118"00' E.

6.163.2For places between Darwin and Cape Leeuwin

60 East-bound. From Mombasa routes are:50 miles N of Seychelles Group, thence:Through 4" 00' S, 73" 30' E, thence:Through 10" S, 80" E, thence:As direct as navigation permits, either to the

65 appropriate recommended track (6.121), or todestination.

6.163.3West-bound. From the Australian coast S of Darwin,

routes are by great circle, as near as navigation permits,70 keeping N of 30· S, 100" E.

91

032-73 NAVIGATION

6.163.4

40°10".. LJ.1.. !.!.LL-'-!....L

Lettered Positions

A 4"OO'S, 73"30'EB 10'OO'S, 80"OO'EF 3O"OO'S, 100"OO'EJ 1"3S'N, 73'4Q'EK 34"28'S, 114'4S'ET 3"OO'S, S4'OO'EY IS"30'S, 120"OO'EZ 11"30'S, l1S"OO'E

DATA SHEET Ql(2)

INDIAN OCEAN

All Seasons

10 JULY 2007

(6.161) ROUTES-Mombasa -E-----+ Eastern Archipelago and Australia.

Aden -. Selat Sunda6.164Diagram (6.164)

October to April, the route is round Raas Caseyr,thence through One and Half Degree Channel, andthence to Selat Sunda.6.164.1

May to September. the route is:N of Suqutni to 13"00' N, 55" 00' E, thence:Through Eight Degree Channel, thence:Landfall on Dondra Head (as at 6.78.2), thence:To Selat Sunda.

6.164.2Distances in miles,

6.163.4Distances in miles:From Mombasa:

Java, Flores f:j BandaSeas Route

61705620

Torres StraitDarwin

Port Hedland.FremantleCape Leeuwin

Selat Sunda.Routeing Position(6' 25' S, 102" 30' E)

E-bound47904840

4860

Ocean Route61505520

W -bound472045704530

Oct-April May-Sept3840 3860

3650 3670

40

45

50

55

60

65

70

92

6.164.3For low-powered vessels, routes are as follows.October to April, round Raas Caseyr thence:

I" 00' S. n" 20' E. in March and April direct, but inOctober to February via 3"00' N, 60" 00' E,thence:

2" 20' S, 76" 30' E, thence:3' 00' S, 94" 30' E, thence:To Selat Sunda.

6.164.4May to September, as for fully-powered vessels as far

as Dondra Head, thence:Across the equator in 96' 30' E, thence:Along the W coast of Sumatera by either the outer

route, W of all the islands, or the middle routebetween the islands in the offing and thoseadjacent to the coast (see Admiralty SailingDirections) to Selat Sunda.

Selat Sunda -+ Aden6.165Diagram (6.164)

October to April, the route is to a landfall on DondraHead, thence as at 6.79 to Aden.Distance (N or S of Suqutra): 3860 miles.6.165.1

May to September, the route is:Through One and Half Degree Channel, thence:8" 00' N, 52' 40' E, thence:Round .fu.~s..,<;_a~~yrto Aden .

Distance: 3940 miles.

032-73 NAVIGATION

12'NM RANGE

WORKSHEET Q4

(This Worksheet must be returned with your answer book)

RADAR PLOTTING SHEETo

o

'A'

0420

10 JULY 2007

+-i 90270 l- 'D'

o •Q)• 0420

0400A

A~-:1100

042004000

'B'

W20 A\~

0400

0

'C'

o 1 2 3 4 5 6 7 8 9 10 11 12Range Scale I. I I I I, I I I I, I I I '1 I I I I, I I I I, I I I I. I t I I, I I I " I I I I1 I I I I. I I I I. I I I I

(This is not a metric scale)

Signature of Candidate .

Examination Centre .