A nice paper nomograph!

BulSoldier · 11-26-07, 03:41 PM

are yyou sure this will fit in A4 ?

d@rk51d3 · 11-26-07, 03:51 PM

Thanks m8

squirrel777 · 11-26-07, 04:40 PM

Quote:

Originally Posted by BulSoldier

are yyou sure this will fit in A4 ?

Hmm... you're right, I have messed up the units, so the pdf is 30.94x21.88 in!!!
But it works fine if you print with the 'Fit to printer margins' option enabled (print box in Acrobat Reader).

I will correct that tomorrow.

TarJak · 11-26-07, 08:06 PM

Nice one thanks matey!

Jonathan · 11-26-07, 08:41 PM

How do you use it?

Pisces · 11-27-07, 08:15 AM

Quote:

Originally Posted by Jonathan

How do you use it?

Whoops! I initially gave a link to maneuveringboard instructions. That usually contains a nomograph, but I should read better.

Draw a line across the nomograph (or just overlay a straight piece of paper/ruler) so it intersects any two known numbers that represent Time, Speed or Distance on their particular scale. The third unknown value of the three (time, speed, or distance) is also intersected.

See Paul Wasserman's (Wazzoo) example

squirrel777 · 11-27-07, 08:36 AM

Wazoo's tutorial (http://www.paulwasserman.net/SHIII/) has a section on using the nomograph at the end.

In summary:
- On the SH3 map, plot the position of your target: for example, by asking the watch officer for the position of the visual contact and then drawing a line from your sub to the contact's bearing/distance. Note the time.
- A few minutes later (I usually wait about 10 min but you can use whatever you want depending on the situation), do the same. Again, note the time.
- Draw a line between the two fixes, this is the route followed by your contact.
- Measure the distance between the fixes (with SH3's line tool).
- Calculate the time elapsed between the two fixes (difference of the times you noted).
- On the nomograph, with a ruler draw an (imaginary) line passing through the measured distance and the calculated time.
- Look at the point where the ruler crosses the 'speed' scale, you can read the speed of your contact!

The good thing is that using the nomograph for the calculation takes less than 5 seconds! (much quicker IMHO than using a table, a calculator or my mental capabilities!)

11-26-07, 03:41 PM	#1
BulSoldier Samurai Navy Join Date: Oct 2007 Location: Burgas/Bulgaria Posts: 550 Downloads: 40 Uploads: 0	are yyou sure this will fit in A4 ? __________________ By the hour !

11-26-07, 03:51 PM	#2
d@rk51d3 Sea Lord Join Date: Sep 2006 Location: Adelaide, South Australia Posts: 1,952 Downloads: 207 Uploads: 0	Thanks m8

11-26-07, 08:06 PM	#4
TarJak Fleet Admiral Join Date: Jul 2006 Location: Sydney, Australia Posts: 17,052 Downloads: 150 Uploads: 8	Nice one thanks matey!

11-26-07, 08:41 PM	#5
Jonathan 中国水兵 Join Date: Nov 2007 Location: Edmond, OK Posts: 285 Downloads: 5 Uploads: 0	How do you use it?

11-27-07, 08:36 AM	#7
squirrel777 Watch Join Date: Sep 2006 Location: London, UK Posts: 21 Downloads: 7 Uploads: 0	Wazoo's tutorial (http://www.paulwasserman.net/SHIII/) has a section on using the nomograph at the end. In summary: - On the SH3 map, plot the position of your target: for example, by asking the watch officer for the position of the visual contact and then drawing a line from your sub to the contact's bearing/distance. Note the time. - A few minutes later (I usually wait about 10 min but you can use whatever you want depending on the situation), do the same. Again, note the time. - Draw a line between the two fixes, this is the route followed by your contact. - Measure the distance between the fixes (with SH3's line tool). - Calculate the time elapsed between the two fixes (difference of the times you noted). - On the nomograph, with a ruler draw an (imaginary) line passing through the measured distance and the calculated time. - Look at the point where the ruler crosses the 'speed' scale, you can read the speed of your contact! The good thing is that using the nomograph for the calculation takes less than 5 seconds! (much quicker IMHO than using a table, a calculator or my mental capabilities!)