Photos: Mustang Survival

Section 7Working with paper charts

Cruise 7-3

General

• Deviation = 0°• Variation = 20°E• All positions and lines plotted on the chart should adhere

to labeling conventions in Supplementary Material• Use Piloting Training Chart C• Plot DRs

– every whole hour– whenever a change of speed or course– Whenever a bearing is taken or fix is obtained

• No wind or current• Show all work and calculations

Depart Refuge Cove @ 09:00

7-3.1 Plot and label your 0937 Fix.

0937

0.5 nm

@ 09:37 you are ½ mile due West of Fl R Light, entrance to Refuge Cove.

0937

L 50º 06.9’ NLo 124º 51.8’ W

Question 7-3.2 What are the coordinates of your 0937 fix?

0937

You proceed on a course of 126°(T) at a speed of 5.0 knots7-3.3 Plot and label your course line

C 126 S 5.0

Plotter used to chart a course line

of 126°

/ 106 M

106° Magnetic

obtained from Plotter or

Calculation

T V M D C

Question 7-3.4 What Compass Course Will You Steer ?

126 20 E 106 0 106

After running this course for 30 minutes, you take two compass bearing on two fixed aids as follows:

•The light on West Redonda Island - ‘Fl 10s 20m 15M’ bears 335°(C)

•The light on Mink Island - ‘Fl(2) 12s 18m 12M’ bears 044°(C)

T V M D C

Question 7-3.5 What is the true bearing of the light on West Redonda Island?

355 20 E 335 0 335

T V M D C

Question 7-3.6 What is the true bearing of the light on Mink Island?

064 20 E 044 0 044

7-3.7 Plot and label this fix.

C 126 S 5.0

/ 106 M

355 / 335 M

064

/ 044 M

Plotter used to chart a bearing of

355°

335° Magnetic

obtained from Plotter or

Calculation

Plotter used to chart a bearing of

064°

044° Magnetic

obtained from Plotter or

Calculation

1007

C 126 S 5.0

/ 106 M

355 / 335 M

064

/ 044 M

1007

L 50º 05.6’ NLo 124º 48.5’ W

Question 7-3.8 What are the coordinates of this fix?

Looking North East up right arm of Desolation Sound

Mink Island

C 126 S 5.0

/ 106 M

355 / 335 M

1007

7-3.9 Alter course to 092°(T) – Increase speed to 6.0 knots Plot and label your course line.

C 092 S 6.0

Plotter used to chart a course

line of 092°

/ 072 M

064

/ 044 M

072° Magnetic

obtained from Plotter or

Calculation

Question 7-3.10 What will be the true bearing of the Mink Island Light when it is abeam to Port?

092 (course)

-

090 (abeam)

=

002 to Port

C 126 S 5.0

/ 106 M

355 / 335 M

1007

Mink Island light will have a bearing of 002(T) when you are abeam to Port

064

/ 044 M

C 092 S 6.0

/ 072 M

002

/ 3

42 M

C 126 S 5.0

/ 106 M

355 / 335 M

1007

Question 7-3.11 When will Mink Island light will be abeam to Port

064

/ 044 M

C 092 S 6.0

/ 072 M

0.9 nm

002

/ 3

42 M

t = 60 X 0.9 6

ETA

1007 + 9 = 1016

60 D

S t

Question 7-3.11 When will the Mink Island light be abeam to Port?

t = 9.0 minutes

t = 60 X D S

C 126 S 5.0

/ 106 M

355 / 335 M

1007

Question 7-3.12 Plot the DR position for the time when the Mink Island light will be abeam to Port

064

/ 044 M

C 092 S 6.0

/ 072 M

002

/ 3

42 M

1016

Exploring East coast

Mink Island

Crume Islands

Mink Island

Still exploring

At 1155, you hear a distress call on your marine radio. A boater has struck Pringle Rock just west of Morgan Island and requests assistance.

1155Distress Call

You are near the north western end of the most northern of the Curme Islands

You answer the call and inform him you are northwest of the most northern of the Curme Islands [use the point of the (34) as your location] and are on your way at a

speed of 20.0 knots.

1155

Question 7-3.13 Plot and label your course line.

1155

C 0

29

S 2

0.0/ 0

09 M

009° Magnetic

obtained from Plotter or

CalculationPlotter used to determine the

direction of the course line

is 029°

Question 7-3.14 What is your estimated time of arrival (ETA) at Pringle Rock?

1.3 nm

C 0

29

S 2

0.0/ 0

09 M

1155

t = 60 X 1.3 20

t = 3.9 (round to 4) minutes

ETA

1155 + 4 = 1159

60 D

S t

Question 7-3.14. What is your estimated time of arrival (ETA) at Pringle Rock?

t = 60 X D S

C 0

24

/ 004

M

S 2

0.0

When you reach Pringle Rock, you find a 5-metre runabout floating and not taking on water, but with a severely damaged outboard drive unit and propeller. The

operator, though unhurt, is very upset with himself for not exercising more care in his navigation. You fashion a towing bridle and begin the tow back to his cabin at

Roscoe Bay.

1155

At 1225, you leave Pringle Rock on a course for Marylebone Point at a speed of 4.0 knots.

C 0

24

/ 004

M

S 2

0.0

1155

1225

C 0

24

/ 004

M

S 2

0.0

1155

1225

Question 7-3.15. What is your true course?

Plotter used to determine the

direction of the course line

is 330°

C 330

T V M D C

330 20 E 310 0 310

Question 7-3.16. What is your compass course?

C 0

24

/ 004

M

S 2

0.0

1155

1225

C 330

/ 310 M

T V M D C

330 20 E 310 0 310

310° Magnetic

obtained from Plotter or

Calculation

S 4.0

Question 7-3.16 What is your compass course?

C 0

24

/ 004

M

S 2

0.0

1155

1225

C 330

/ 310 M

S 4.0

Question 7-3.17 At what time will you be close aboard Marylebone Point ?

1225

1.6 nm

t = 60 X 1.6 4

t = 24 minutes

ETA

1225 + 24 = 1249

60 D

S t

t = 60 X D S

Question 7-3.17 At what time will you be close aboard Marylebone Point ?

Question 7-3.18 What are the coordinates of Marylebone Point Light?

L 50° 09.7’ N

Lo 124° 45.1’ W

You round Marylebone Point and enter Rosecoe Bay