SUBSIM Radio Room Forums - View Single Post - Is there a good guide to Firing Solutions anywhere?

Front Runner · 12-20-20, 04:22 PM

When you are sending the range and bearing info to the TDC, you HAVE to DOUBLE-CLICK it in order to get the TDC to update the information on the left side of the screen.
I just default to double-clicking all the information: speed, AOB, range. If you are using the position keeper, the order is this...
You must have the target locked in periscope or TBT view.

1. Identify the target and upload the information to the TDC using the check mark from the Recognition Manual ship ID page. This sends target name and marked reference height to the TDC for Range Stadimeter use.

2. Start the Position Keeper.

3. Estimate Range. Use the stadimeter. Make sure you have sent the information up from the Recognition Manual target ship ID page for the particular ship you are targeting/ranging. If you change targets, go back to the Recognition Manual, tab to the new target ship page, resend the info to TDC, check the range and double click to update TDC.

4. Estimate AOB. If you know your targets course your TDC will display the known target course upon setting the correct AOB.

5. Estimate Target Course and Speed.

6. Set up Torpedoes. If using Slow Speed (dual speed torps), you have to click High Speed and then Low Speed in order to get the TDC to update properly. If you're using Low Speed and do not do this, your solution will be way off. Check your Attack Map to see how this affects your calculated torpedo track.

7. Don't forget to Open Torpedo Tubes.

8. Repeat 3 thru 5 as many times as it takes to get a good solution. Check Attack Map to see what it's telling you.

9. Do this quickly. Make a Final adjustment to AOB and SPEED if necessary. Take a FINAL Bearing and Range, double click on the send range and bearing button on the right hand TDC and shoot.

Practice setting up the above parameters. Practice setting up shots on friendly ships without shooting. Check your Attack Map to see if you're accurate.

Alternatively, if you are using Dick O'Kane method, range is not a factor. You NEED to know Target COURSE and Target SPEED. Set up for a 90 degree (or 45 degree) Zero Gyro angle shot and when the target crosses the bearing line, shoot.
Do NOT use the Position Keeper!

For instance, this is for a 90 degree Zero gyro angle approach, you have a target approaching from right to left at 8 knots. You are going to use the Mark 14 Torpedo at high speed (46 knots). Set your periscope up at 10 degrees relative bearing. Leave it there (for now). Set your target speed to 8 knots. Set your AOB to Port 80 degrees (10 degrees less than 90). Set your range to the MAXIMUM that your range dial will allow, 1000 yards will do. Range doesn't matter. Don't forget to double click Send Range & Bearing. Check your Attack Map, you should see the Torp Track extend straight out from your boat. Change your Torpedo Speed to LOW and see how that affects your Torp Track, it will move to the left somewhat. Change Torp Speed back to high and go back to Periscope.

Once you've set up your shot, you can sweep your periscope or use the other periscope or TBT if you're surfaced to see and track the target until her bow crosses 10 degrees relative bearing, then shoot 1 torp every 5 seconds.

Torpedo Impact!

Reference materials...
https://www.subsim.com/radioroom/sho...d.php?t=223251

Practice. Also watch Colonel Sanders Lite "Convoy College" series and take notes...

12-20-20, 04:22 PM	#9
Front Runner Sonar Guy Join Date: Mar 2007 Location: The FREE State of FLORIDA Posts: 399 Downloads: 215 Uploads: 0	One of the tricks.. When you are sending the range and bearing info to the TDC, you HAVE to DOUBLE-CLICK it in order to get the TDC to update the information on the left side of the screen. I just default to double-clicking all the information: speed, AOB, range. If you are using the position keeper, the order is this... You must have the target locked in periscope or TBT view. 1. Identify the target and upload the information to the TDC using the check mark from the Recognition Manual ship ID page. This sends target name and marked reference height to the TDC for Range Stadimeter use. 2. Start the Position Keeper. 3. Estimate Range. Use the stadimeter. Make sure you have sent the information up from the Recognition Manual target ship ID page for the particular ship you are targeting/ranging. If you change targets, go back to the Recognition Manual, tab to the new target ship page, resend the info to TDC, check the range and double click to update TDC. 4. Estimate AOB. If you know your targets course your TDC will display the known target course upon setting the correct AOB. 5. Estimate Target Course and Speed. 6. Set up Torpedoes. If using Slow Speed (dual speed torps), you have to click High Speed and then Low Speed in order to get the TDC to update properly. If you're using Low Speed and do not do this, your solution will be way off. Check your Attack Map to see how this affects your calculated torpedo track. 7. Don't forget to Open Torpedo Tubes. 8. Repeat 3 thru 5 as many times as it takes to get a good solution. Check Attack Map to see what it's telling you. 9. Do this quickly. Make a Final adjustment to AOB and SPEED if necessary. Take a FINAL Bearing and Range, double click on the send range and bearing button on the right hand TDC and shoot. Practice setting up the above parameters. Practice setting up shots on friendly ships without shooting. Check your Attack Map to see if you're accurate. Alternatively, if you are using Dick O'Kane method, range is not a factor. You NEED to know Target COURSE and Target SPEED. Set up for a 90 degree (or 45 degree) Zero Gyro angle shot and when the target crosses the bearing line, shoot. Do NOT use the Position Keeper! For instance, this is for a 90 degree Zero gyro angle approach, you have a target approaching from right to left at 8 knots. You are going to use the Mark 14 Torpedo at high speed (46 knots). Set your periscope up at 10 degrees relative bearing. Leave it there (for now). Set your target speed to 8 knots. Set your AOB to Port 80 degrees (10 degrees less than 90). Set your range to the MAXIMUM that your range dial will allow, 1000 yards will do. Range doesn't matter. Don't forget to double click Send Range & Bearing. Check your Attack Map, you should see the Torp Track extend straight out from your boat. Change your Torpedo Speed to LOW and see how that affects your Torp Track, it will move to the left somewhat. Change Torp Speed back to high and go back to Periscope. Once you've set up your shot, you can sweep your periscope or use the other periscope or TBT if you're surfaced to see and track the target until her bow crosses 10 degrees relative bearing, then shoot 1 torp every 5 seconds. Torpedo Impact! Reference materials... https://www.subsim.com/radioroom/sho...d.php?t=223251 Practice. Also watch Colonel Sanders Lite "Convoy College" series and take notes... __________________ "It is well war is so terrible, lest we should grow too fond of it" - C.S.A. General Robert E. Lee "Only the dead have seen the end of war" - Plato Gone but not forgotten, RIP Dave "LeoVampire". Last edited by Front Runner; 12-20-20 at 04:32 PM.