Navigation Questions. Can you do them? - Page 12 - SailNet Community
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post #111 of 122 Old 03-08-2010 Thread Starter
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Same as a plotting sheet? YES

It is called "Universal Plotting Sheet, VP-OS

If you have "Bowditch" American Practical Navigator, Pub 9, Then you have the tables.

Are there Lights & Towers in that part of the world?? Probably only if you have an excellent imagination...

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post #112 of 122 Old 03-08-2010
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Quote:
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If you have "Bowditch" American Practical Navigator, Pub 9, Then you have the tables.
But I only have Volume I...

Quote:
Are there Lights & Towers in that part of the world?? Probably only if you have an excellent imagination...
Okay well let's say that there are

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post #113 of 122 Old 03-08-2010 Thread Starter
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You need vol II or go and get the new Bowditch. Or download it from nga.mil/portal/site/maritime/
Downloading it only costs you time & effort.

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post #114 of 122 Old 03-09-2010
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You need vol II or go and get the new Bowditch. Or download it from nga.mil/portal/site/maritime/
Downloading it only costs you time & effort.
I have gotten bits and pieces of it for the stuff I happened to be interested in reading about at the time, mostly chapters 15 - 20 or so. That stuff doesn't seem to have changed, except that my edition (1977) seems to have more exercises.

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post #115 of 122 Old 03-09-2010 Thread Starter
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I have gotten bits and pieces of it for the stuff I happened to be interested in reading about at the time, mostly chapters 15 - 20 or so. That stuff doesn't seem to have changed, except that my edition (1977) seems to have more exercises.
Well at least download the tables and print out the ones you want to use and put them in a binder.

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Well at least download the tables and print out the ones you want to use and put them in a binder.
ooh....

Anyway what's the next problem? I think the most important thing for me to learn is to read the given values well and use them, as opposed to making up my own numbers. Methods aren't as useful when you arbitrarily filter input data

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This one hasn't been worked yet that I know of...

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A ship is on course of 062°, speed 15 kts: Its 1400 DR position is L18°08.08S, λ122°16.0W. At 1420 the distance to Light G at L17 °57.0S, λ122°20.0W, is 9.5 N Miles, no accurate bearing can be taken. At 1620, the bearing of the tower at H L17°39.0S, λ121°44.0W, is 351°. Advance the 1420 circle of position and determine the 1620 running fix.


Note: Use a universal chart for this.

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Or try this one. Your vessel is on a course of 343°T at 14 kts. At 2156 a light bears 320.5°T and at 2217 the light bears 298°T. At what time and at what distance off will your vessel be when abeam of the light?




Hint: This is a 7/10th Rule... You can victor it or just do the math.

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Quote:
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This one hasn't been worked yet that I know of...
So
Quote:
L17°45.25'S by λ121°43.06'W
was incorrect?

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post #120 of 122 Old 03-09-2010 Thread Starter
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Ooopsie! I didn't see that... will check when I get home

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