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Fourteen Second Glass.

6 o 8o

I 4

2 4 3 2 O

6 o 8o
3600 ) 8 5 1 2 0 ( 2 3.6 4
7 200

X I 2
I 3 I 2 O
IO 80 64

2 3 2 0 0 7.6 8 = 734 inches, nearly.
2 1 6oo

I бооо

I 2 8

I 4 4

I 6 OO

The length of a knot for a fourteen second glass is 23.64 feet = 23 feet 7 inches nearly.

Twenty Eight Second Glass.
6 o 8o

2 8
48 640

I 2 I 6 o
3600 ) 1 7 0 2 4 0 ( 4 7.2 9

I 4 4 0 0 X I 2
2 6 2 4

5 8
2 5 2 0 0 2 9
I O 400 3.48 = 372 inches, nearly.

7 2
3 2
3 2 4

400 The length of a knot for a twenty-eight second glass is 47.29 feet = 47 feet 33 inches nearly.

5 0.6 6

Thirty Second Glass. 6 080

30 3600 ) 1 8 2 400 I 80

XI 2 2 4

I 3 2 2 I 6

6 6 24

7.9 2 = 8 inches, nearly. 2 I 6 oo

24 Oo

The length of a knot for a thirty second glass is 50.66 feet = 50 feet 8 inches nearly.

This log is hove from the lee quarter and as soon as the red rag is on the taffrail, the glass is turned and the speed of the ship will be the number of knots run over the rail while the sand in the glass runs down.

The examiner does not as a rule require the applicant to perform this calculation. The answer to the question as given on page 29, is all that is necessary.

2 Wreck.

Lighthouse......
Lighthouse on small, soale chart . ord light tower
Beacon, lighted .....

Beacon, not tighted .... Spindle (or stake).

add word Spindle if space

allows Lightship. Anchorage...... Rook awash at low water.......*

Sunken roche ........ Life Saving Station...... LSS (T)... .signifles oonnection with

telegraphic syotem. Kelp............ No bottom at 20 fathoms

.................... ZO etc Red buoy

8 or add word white or yellow as required.
Black buoy......
Horizontally striped buoy...........
Perpendicularly striped buoy.................
Buoys with perch and square...
Buoys with penah and ball...
Lighted buoy........... ............ in place of

eto.
Mooring buoye..........
Landmark, as Cupola. Standpijpe, 260.....
Whirlpool.....

as ...............

...........................

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second .

1.0->

• third

0.3 →

ebb,

otherwise like flood. Statute miles.

FOR CONVERTING NAUTICAL MILES INTO STATUTE

MILES.

Nautical miles.

Nautical Statute

miles. miles.

1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00 7.25 7.50 7.75 8.00 8.25 8.50

Nautical

miles.

Statute
miles.

1.151 1.439 1.727 2.015 2.303 2.590 2.878 3.166 3.454 3.742 4.030 4.318 4.606 4.893 5.181 5.469 5.757 6.045 6.333 6.621 6.909 7.196 7.484 7.772 8.060 8.348 8.636 8.924 9.212 9.500 9.787

8.75 9.00 9.25 9.50 9.75 10.00 10.25 10.50 10.75 11.00 11.25 11.50 11.75 12.00 12.25 12.50 12.75 13.00 13.25 13.50 13.75 14.00 14.25 14.50 14.75 15.00 15.25 15.50 15.75 16.00 16.25

10.075 10.363 10.651 10.939 11.227 11.515 11.803 12.090 12.378 12.666 12.954 13.242 13.530 13.818 14.106 14.393 14.681 14.969 15.257 15.545 15.833 16.121 16.409 16.696 16.984 17.272 17.560 17.848 18.136 18.424 18.712

16.50 16.75 17.00 17.25 17.50 17.75 18.00 18.25 18.50 18.75 19.00 19.25 19.50 19.75 20.00 20.25 20.50 20.75 21.00 21.25 21.50 21.75 22.00 22.25 22.50 22.75 23.00 23.50 24.00 24.50 25.00

18.999 19.287 19.575 19.863 20.151 20.439 20.727 21.015 21.303 21.590 21.878 22.166 22.454 22.742 23.030 23.318 23.606 23.893 24.181 24.469 24.757 25.045 25.333 25.621 25.909 26.196 26.484 27.060 27.636 28.212 28.787 miles.

One nautical mile=6080 feet.

FOR CONVERTING STATUTE MILES INTO NAUTICAL

MILES.

Statute miles.

Nautical

Nautical

1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00 7.25 7.50 7.75 8.00 8.25 8.50 8.75

Statute
miles

Nautical

miles.

Statute
miles.

miles.

0.868 1.085 1.302 1.519 1.736 1.953 2.170 2.387 2.604 2.821 3.038 3.256 3.473 3.690 3.907 4.124 4.341 4.559 4.776 4.994 5.211 5.428 5.645 5.862 6.079 6.296 6.513 6.730 6.947 7.164 7.381 7.598

9.00 9.25 9.50 9.75 10.00 10.25 10.50 10.75 11.00 11.25 11.50 11.75 12.00 12.25 12.50 12.75 13.00 13.25 13.50 13.75 14.00 14.25 14.50 14.75 15.00 15.25 15.50 15.75 16.00 16.25 16.50 16.75

7.815 8.032 8.249 8.467 8.684 8.901 9.118 9.335 9.552 9.769 9.986 10.203 10.420 10.638 10.855 11.072 11.289 11.507 11.724 11.941 12.158 12.376 12.593 12.810 13.027 13.244 13.461 13.678 13.895 14.112 14.329 14.546

17.00 17.25 17.50 17.75 18.00 18.25 18.50 18.75 19.00 19.25 19.50 19.75 20.00 20.25 20.50 20.75 21.00 21.25 21.50 21.75 22.00 22.25 22.50 22.75 23.00 23.25 23.50 23.75 24.00 24.25 24.50 25.00

14.763 14.980 15.197 15.414 15.632 15.849 16.066 16.283 16.500 16.717 16.934 17.151 17.369 17.586 17.803 18.020 18.237 18.454 18.671 18.888 19.105 19.322 19.539 19.756 19.973 20.191 20.408 20.625 20.842 21.060 21.277 21.711

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One statute mile=5280 feet.

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