Â **Marine Navigation Cruise**

Tower R Lt on the hill to the north, 41Â° 45.6' N, 071Â° 55.2' W

Chapman Point light Fl 6s 18M HORN. 41Â° 41.4' N, 072Â° 05.5' W

R â10â Q R 41Â° 39.6' N, 071Â° 57.6' W

R N â2â the entrance to Blackfish Creek 41Â° 35.3' N, 071Â° 55.2' W

R N â4â. 41Â° 33.6' N, 071Â° 55.1' W

G C â3â at the entrance to Blackfish Creek 41Â° 33.9' N, 071Â° 54.4' W

Fl 8s 20 ft 5M beacon on Channel Island 41Â° 41.7' N, 071Â° 53.8' W

R â8â I Q R 41Â° 40.2' N, 071Â° 51.9' W

The cruise is found in Appendix A, p 97 of the Student Manual.

The cruise is taken on Bowditch Bay.Â For all questions, use a variation of 15 W

The bearing to the Chapman Point light Fl 6s 18M HORN is 285Â°M

and the bearing to the Tower R Lt north of Channel Island is the same as your previous reading â 027Â° M

What is the L & Lo of 1000 FIX?

Tower Â Â Â Â Â Â Â Â Â Â Â Â Â Â Chapman

T = 012Â° Â Â Â Â Â Â Â Â Â Â T = 270Â°

V = 015Â° W Â Â Â Â Â V = 015Â° W

M = 027Â°Â Â Â Â Â Â Â Â Â M = 285Â°

Plot and label each bearing. The intersection of these two bearings is a fix. Plot and label the 1000 fix.

What is the L & Lo of 1000 FIX?

Measure distance to R â10â Q R

D = 2.0

Then, determine time to travel 2.0 nm

D = 2.0

Â 60 D = ST

Â 60 * 2.0 / 20.0 = T

Â 6.0 = T

ETA:

Â Â 1000

Â +Â __0006__

Â Â Â 1006

T = 208Â° Â

V = 015Â° W Â

M = 223Â° Â

5b. What is your course from 1000FIX to R â10â Q R?Â Â Â Â **223Â° M**

6. You arrive at R â10âQ R at your estimated time (1006)., Plot a course from R â10âQ R to R N â2â at the entrance to Blackfish Creek. Reduce speed to 4.5 kn.

Plot and label the fix at 1006.

Plot and label the course to R N â2â

T = 158Â° Â

V = 015Â° W Â

M = 173Â° Â

Plot the 1100 DR position

Determine time to 1100

Â 11 hr 00 min

-__10 hr 06 min__

Â Â Â Â Â Â 54 min

60 D = ST

D =Â __4.5 * 54__

Â Â Â Â Â 60

D = 4.05 = 4.1 (round up)

Plot 1100 DR on course line

Determine L/Lo

Â **Â 6b. 1100 DR position is: L 41Â° 35.8â N Lo 071Â° 55.5â WÂ **

7. Arrive at R N â2â at 1112. Plot a course to R N â4â. You increase your speed and arrive at 1120.

Plot and label the 1112 fix

Plot and measure the course to R N â4â. Label the leg.

T = 176Â° Â

V = 015Â° W Â

M = 191Â° Â

Determine the time you traveled on this leg. Measure the distance of this leg.

Calculate your average speed

Â 11 hr 20 min

-__11 hr 12 min__

Â Â Â Â Â Â 8 min

Â D = 1.7

Â 60 D = ST

Â 60 * 1.7 = S * 8

Â 60 * 1.7 / 8 = SÂ

Â S = 12.75 = 12.8 (round up)

8. You depart from G C â3â at at 1300 and lay a course of 023Â° M at a speed of 20 kn. Â

Plot the fix at G C â3â. Label this course.

T = 008Â° Â

V = 015Â° W Â

M = 023Â° Â

At 1316 take a bearing on the Fl 8s 20ft 5M beacon on Channel Island of 011Â°M. Take another bearing on the R â8âI Q R buoy. of 068Â°M. Plot the two bearing FIX.

First, calculate and plot your DR position.

Time:

13 hr 16 min

- 13 hr 00 min

Â 16 min

DR Position

60 D = ST

Â D = 20 * 16

Â 60

D = 5.33 = 5.3 (round down)

Calculate and plot the bearings

Channel Isl R â8âI Q RÂ

T = 356Â° T = 053Â°

V = 015Â° W V = 015Â° W

M = 011Â° M M = 068Â°

Use the dividers to measure the L/Lo of 1316 Fix:

8a. 1316 DR position L 41 39.2â N Lo 071 53.4â W

End of Part 2