Calculating enemys course

[Kumando]

Originally Posted by Corsair

I guess you have to accept the fact that when you raise the difficulty it makes things more complicated. Since I also use manual navigation I miss also more shots, but in a way that's what I have been looking for. If you hit 100% of the time, it gets a little boring after a while...
I still use the 3'15" method and work it the other way around. Once I have plotted the target estimated course, the reverse bearing and distance give me the estimated position of my sub and I plot my own course from there.
The point is that all these are now estimated positions, and if your estimation is off the mark, you're in for a miss. But that's what they had to work with at the time...

Yes this is much more difficult now but with navigation chart i took from the community manual maybe i will plot a decent targert course now . Will see later.

[Kumando]

Originally Posted by Abd_von_Mumit

You don;t need the icon, man. You don't even need the map, to face the truth. All that's important is the RELATIVE course, you can plot it on a blank sheet of paper, on a black board or on the floor with a piece of coal... Just anywhere. Just think about it.

To do the Wazoos manual targeting while moving he instructs you to mark a position on the center of your sub an then to start moving at ahead slow, past 3:15 minutes you put another mark whre you sub is at the moment, so if you have no sub icon you have to consult the speed charts to plot where you are past 3:15 minutes it envolvs much more calculation an difficulty to the targeting that viewing your sub all the time, i suggest you try it to see.

[Abd_von_Mumit]

Originally Posted by Kumando

To do the Wazoos manual targeting while moving he instructs you to mark a position on the center of your sub an then to start moving at ahead slow, past 3:15 minutes you put another mark whre you sub is at the moment, so if you have no sub icon you have to consult the speed charts to plot where you are past 3:15 minutes it envolvs much more calculation an difficulty to the targeting that viewing your sub all the time, i suggest you try it to see.

Yes, sure, I know it makes it a bit harder, but:
- see, what Corsair said about making things harder. Wise words.
- you can mark your starting position and the next position AND even the 'nexter' position anytime. You certainly don't have to wait till the 3.15 passes and then plot all the marks at the same moment. So you have plenty of time to mark your future position with really good precision.

[raduz]

man! I must admire you for playing without seeing your sub on the chart... I suppose you have 100 percent realism on? and how do you find the contacts position? with stadimeter?

[Nikita]

Use this http://www.paulwasserman.net/SHIII/WazooNomoModBig.rar. The nomograph lets you pick up speed and course in just 30 seconds.

Well, really just for speed and range, but if you pick up two ranges in 30 seconds (more time better), you get the course.

[Kumando]

Originally Posted by raduz

man! I must admire you for playing without seeing your sub on the chart... I suppose you have 100 percent realism on? and how do you find the contacts position? with stadimeter?

I play with 84%, WE on only for identifying some ships im not sure of not for ploting solutions (i do it myself) and external camera for eye candy only. I find my contacts position trough the hidrophones and visual observation (periscope/uzo) you dont really need to know where your sub is to do this, the stadimeter is only for calculating the targets range mate, but the all purpose of my first question is that normally i make the 90º AoB approach, but sometimes its not possible to make such an approach and i wanted a fast way to calculate the targets course to determine the AoB in other angles than 90º.

[Kumando]

Originally Posted by Nikita

Use this http://www.paulwasserman.net/SHIII/WazooNomoModBig.rar. The nomograph lets you pick up speed and course in just 30 seconds.

Well, really just for speed and range, but if you pick up two ranges in 30 seconds (more time better), you get the course.

I used the draggable version before and it was very usefull, but since i removed the sub icon from the map i cant make the nomograph to show on the map no more.

Distance in Kmeters x 32.5 divided by minutes = knots
Or distance in meters x .0325 divided by minutes = knots

Plot target's first position and begin timer. Plot subsequent positions and plot target's general course. Measure distance traveled and note minutes on timer.

For example 2.6 Km x 32.5 divided by 12 minutes = 7.0416 knots

The more observations and calculations you make, the more accurate your estimation of speed.

This is really useful with a target on a zig-zag course.

Originally Posted by Kumando

Hi felow Kaleuns, do you know other quick method to calculate the enemys course rather than the 3:15 rule?

3:15 rule is not to get course, but rather speed. As the distance between plots made with 3 min 15 sec's seperation is equal to speed in knots/10. So make the plots seperated with 3:15 and measure the distance between plots in meters. Now multiply that with 10 and voila - Knots.



Now if you ARE looking for target Course

Then that realy depends on what info you have available on the target at hand.



1---
You could use the whizwheel if you have
A) own sub's heading B) Bearing to target C) AoB

2---
a Second method is simply plotting it from WO's calls - never mind the time seperation as you dont need speed to have course from the plot.

3---
the third and most dificult way (also not very WWII'ish) is TMA on hydrophone plots. TMA = Target Motion Analysis. This is VERY dificult and time consuming, but if your a NERD i guess it could be a fun and tormenting study. Hit words for Google would be Ekelund Range, TMA, Geo-plot, one-bearing only. I'm simply do not know enough about this to be able to tell you about it my self.


As for the plotting it self - mummit is 100% right. You dont need jack but a paper and a set of rulers to plot. Make a north arrow on the paper - now make a line that has your sub's course. Now make small hacks on that line with the interval in scale that your sub at current speed will travel in 3 min 15 sec's. Make lots of hacks.

Take a bearing Range reading of the target - start the stopwatch and then plot that at the first hack. As the stopwatch comes to 3.15 make the next plot from the second hack. At 6.30 the thired plot from the thired hack etc etc etc. Soon the target plots will show a direction - connect the dots and voila - course. Now measure the speed from the plot spot distances. If your a tad clever you can now "draw ahead in time" your own approach to the shooting spot and then be sure to follow that planed rout's headings and speed's. When you arrive on the shoot spot you can make a couple of extra plots on the target just to be sure that he is STILL going the same speed and heading.

[Kumando]

Originally Posted by Corsair

I still use the 3'15" method and work it the other way around. Once I have plotted the target estimated course...

Corsair how exactly do you estimate the targets course? By eye or you do some kind of conversion with the bearing to target?

[Nikita]

Originally Posted by Kumando

I used the draggable version before and it was very usefull, but since i removed the sub icon from the map i cant make the nomograph to show on the map no more.

Use the fixed nomograph, vertical or horizontal.