SUBSIM Radio Room Forums - View Single Post - [TEC] Manual TDC Tutorial For SH5 with No Map contacts

emtguf · 03-14-10, 07:37 PM

TDC Tutorial For SH5 with No Map contacts.

This tutorial will show how to use the Manual TDC with no Map contacts, and using the map to plot your targets course, speed, aob etc....
I am also including the mission I made to do this tutorial on so you can practice with it. http://www.filefront.com/15832095/TD...-_Mission.rar/
This missions is JSGME ready so just unrar into your mods folder.

First thing is first. The Stadimeter is broken right now so it can be tricky getting accurate ranges from it alone. The ship I am using in this tutorial is a Troop transport. To get the correct stadimeter reading on this ship you must use the top of the bridge roof. This will get you pretty close. Others it is the funnels, ans still again others the Masts. So takes some practice to remember what is measured from what.

Ok first screen shot shows taking the first stadimeter reading. I am a little high in the reading so it is a bit off true distance.

For this next screenshot what I am doing is dragging off a ruler line in the middle of my pariscope view as this is basically where the target is. Speaking of which I am working on a mod to add a compass to the map so you dont have to go off of the sight line and can draw to actual coordinates. Once you get to the range mark it.

For this next shot you can see that I am moving my bearing +10 degrees. I wait here for the ship to pass and take another stadimter reading.
Once again entering that data onto the map.

For the next shot I am taking a 3rd reading. This is a few minutes later. I take a stadimeter reading, and plot it onto my map.

now After getting that info I go to the large map screen to plot out the course. As you can see I basically draw a line out taking the average distance to get a straight path, since your range estimates will be off some. Draw out the line and there is your course. To get your AOB draw a protractor line from your ships line (the north/south ruler mark) and then toward the target ships course.

Speed.... This is somethign that can be quite tricky to get. Looking at the screenshot you can see that the computer thinks it is going at 12 knots after all my range data. Well I want to make sure so I am going to look at it another way. Get the mod that adds data to the Recog manual (http://www.subsim.com/radioroom/down...o=file&id=1606) install this mod.....
So now open up the manual and find your target ships length. As you can see here it is 147.

Now what you want to do is time how long it takes the ship to pass your scope bow to stern. So open up your stopwatch, and as soon as the bow hits your scope mark start timing.

Now you can see that it took 32 seconds to pass. stop counting the second the stern passes the mark.

now time for a little math. take the ships length (147) and divide it by how many seconds it took to pass (32) 147/32. Should come up with 4.59 and some change. Round up since it is over .50 and you get 5, now simply double that and you have the ships knots at 10kts. This method only works if you are stopped or If you are at a 000 bearing to the target. Anything off of there and your ships speed affects it.

I generally take one more stadimeter reading to get a good final distance and let the fish fly.

And here is the death hit.

This method works well considering that the stadimeter is not quite correct. I use this for 90degree shots, and off shots as well. Takes some getting used to and the further out the more precise you need to be.
Hopefully this helps people get away from relying on the Map contacts, and understand some of the easier methods to gather the data without using map contacts.
Any questions drop me a line or ask here.
Good luck all.

03-14-10, 07:37 PM	#1
emtguf Machinist's Mate Join Date: Oct 2005 Posts: 128 Downloads: 44 Uploads: 3	[TEC] Manual TDC Tutorial For SH5 with No Map contacts TDC Tutorial For SH5 with No Map contacts. This tutorial will show how to use the Manual TDC with no Map contacts, and using the map to plot your targets course, speed, aob etc.... I am also including the mission I made to do this tutorial on so you can practice with it. http://www.filefront.com/15832095/TD...-_Mission.rar/ This missions is JSGME ready so just unrar into your mods folder. First thing is first. The Stadimeter is broken right now so it can be tricky getting accurate ranges from it alone. The ship I am using in this tutorial is a Troop transport. To get the correct stadimeter reading on this ship you must use the top of the bridge roof. This will get you pretty close. Others it is the funnels, ans still again others the Masts. So takes some practice to remember what is measured from what. Ok first screen shot shows taking the first stadimeter reading. I am a little high in the reading so it is a bit off true distance. For this next screenshot what I am doing is dragging off a ruler line in the middle of my pariscope view as this is basically where the target is. Speaking of which I am working on a mod to add a compass to the map so you dont have to go off of the sight line and can draw to actual coordinates. Once you get to the range mark it. For this next shot you can see that I am moving my bearing +10 degrees. I wait here for the ship to pass and take another stadimter reading. Once again entering that data onto the map. For the next shot I am taking a 3rd reading. This is a few minutes later. I take a stadimeter reading, and plot it onto my map. now After getting that info I go to the large map screen to plot out the course. As you can see I basically draw a line out taking the average distance to get a straight path, since your range estimates will be off some. Draw out the line and there is your course. To get your AOB draw a protractor line from your ships line (the north/south ruler mark) and then toward the target ships course. Speed.... This is somethign that can be quite tricky to get. Looking at the screenshot you can see that the computer thinks it is going at 12 knots after all my range data. Well I want to make sure so I am going to look at it another way. Get the mod that adds data to the Recog manual (http://www.subsim.com/radioroom/down...o=file&id=1606) install this mod..... So now open up the manual and find your target ships length. As you can see here it is 147. Now what you want to do is time how long it takes the ship to pass your scope bow to stern. So open up your stopwatch, and as soon as the bow hits your scope mark start timing. Now you can see that it took 32 seconds to pass. stop counting the second the stern passes the mark. now time for a little math. take the ships length (147) and divide it by how many seconds it took to pass (32) 147/32. Should come up with 4.59 and some change. Round up since it is over .50 and you get 5, now simply double that and you have the ships knots at 10kts. This method only works if you are stopped or If you are at a 000 bearing to the target. Anything off of there and your ships speed affects it. I generally take one more stadimeter reading to get a good final distance and let the fish fly. And here is the death hit. This method works well considering that the stadimeter is not quite correct. I use this for 90degree shots, and off shots as well. Takes some getting used to and the further out the more precise you need to be. Hopefully this helps people get away from relying on the Map contacts, and understand some of the easier methods to gather the data without using map contacts. Any questions drop me a line or ask here. Good luck all.