SUBSIM Radio Room Forums - View Single Post - Am I Manually Targeting or am I kidding myself??

CaptainEO · 10-24-05, 11:06 PM

I never seem to get good values from the speed stopwatch method. I do better just guessing the speed myself (if you have a radio report on the convoy, it includes the correct speed!).

You have to enable the Manual button (the little red thing) in order to change the speed setting. Turn it back off to link the bearing and AOB to the scope.

Here's what I do:

1. Get into a 90 degree intercept position (i.e. lie in wait at a position where the target will cross directly in front of you at a 90 degree angle).

2. Swing scope to bearing 000.

3. Turn Manual ON, enter estimated speed, set AOB to 90 degrees port or starboard as appropriate. Turn Manual OFF. (it's very important that the scope be pointing at bearing 000 when you enter the 90 degree AOB. What you are really doing is telling the TDC that the AOB will be 90 degrees when the target crosses directly in front of you. With Manual OFF the TDC will track the correct AOB and bearing automatically based on where the scope is pointing).

I don't think it's a good idea to enter the AOB on the notepad since you don't want to over-write your good AOB value with a possibly bad one when you take a last-minute range reading.

4. Identify target ship and use "notepad method" to get range.

I update the range right before I'm going to shoot. If you click the check-mark on the notepad it will transfer the range estimate into the TDC (regardless of whether Manual is ON or OFF).

5. Wait until gyroange is between 350 and 10, then fire!

I never miss inside of 1km. At longer distances I'm more likely to miss if there is much error in my range or speed estimates. For a hit at 1km I'd guess you need to know the range to within +/- 200m and the speed to within +/- 2 kt.

10-24-05, 11:06 PM	#13
CaptainEO Swabbie Join Date: Oct 2005 Posts: 14 Downloads: 0 Uploads: 0	I never seem to get good values from the speed stopwatch method. I do better just guessing the speed myself (if you have a radio report on the convoy, it includes the correct speed!). You have to enable the Manual button (the little red thing) in order to change the speed setting. Turn it back off to link the bearing and AOB to the scope. Here's what I do: 1. Get into a 90 degree intercept position (i.e. lie in wait at a position where the target will cross directly in front of you at a 90 degree angle). 2. Swing scope to bearing 000. 3. Turn Manual ON, enter estimated speed, set AOB to 90 degrees port or starboard as appropriate. Turn Manual OFF. (it's very important that the scope be pointing at bearing 000 when you enter the 90 degree AOB. What you are really doing is telling the TDC that the AOB will be 90 degrees when the target crosses directly in front of you. With Manual OFF the TDC will track the correct AOB and bearing automatically based on where the scope is pointing). I don't think it's a good idea to enter the AOB on the notepad since you don't want to over-write your good AOB value with a possibly bad one when you take a last-minute range reading. 4. Identify target ship and use "notepad method" to get range. I update the range right before I'm going to shoot. If you click the check-mark on the notepad it will transfer the range estimate into the TDC (regardless of whether Manual is ON or OFF). 5. Wait until gyroange is between 350 and 10, then fire! I never miss inside of 1km. At longer distances I'm more likely to miss if there is much error in my range or speed estimates. For a hit at 1km I'd guess you need to know the range to within +/- 200m and the speed to within +/- 2 kt.