TDC reset, how do you do it?

[amurph182]

Originally Posted by odjig292

I twice tried using the TDC to calculate speed and got "not enough data". I haven't installed TM1.4 yet. Does it correct this?

you have to take at least two ranges. You identify the target, range it and send the range data to the TDC. Wait a few minutes (I usually wait 3-5) and then range it again and send the data to the TDC. THEN hit the button to calculate speed.

If you only take one range measurement or you don't send the range data to the TDC then you won't get the speed estimate.

Both were dead in the water and I circled to bring stern tubes to bear but I could not get the torpedo solution to change to finish them off. I clicked the Range and Bearing settings over and over as well as activated and deactivated the PK twice before the screen crashed.

you must be doing something wrong here. If they are dead in the water, then you just set the speed to zero and in theory you don't even need to set the AOB. Even with the PK on, when you take a new range and send it to the TDC it will update the range and bearing of the solution.

Are you not hitting the button to send the data to the TDC? Or are you not changing the speed to zero for your motionless targets?

You don't need to zero out the tdc or turn off the pk, when you have updated all of the settings the pk will simply track the target that your settings describe. If the PK is tracking a target at 1000 yards, bearing 000, AOB 90P, course 270, speed 5, and you change the AOB to 90S, the PK begins tracking a target at 1000 yards, bearing 000, course 090, speed 5. It updates those variables over time to show the motion of the target, but if you then change the range, bearing, AOB and speed it begins tracking from the last input you made.

THe only thing the PK does is show the current position of the target based upon the last entry you made. Whenever you change something it is basically the same thing as creating an entirely new solution.

Why can't I clear the previous solutions?

there are no "previous solutions." There is only one solution, and it is based off of the last information entered. The PK doesn't keep track of previous inputs, it just shows the target's position based on last input. Every data input is a new solution, and the pk tracks from that point.

What it CAN do is screw up your measurements if you don't put them in fast enough. Since it is tracking a moving target, the variables are constantly changing. If you switch to a different target and put in range, it will track a target with the same AOB and speed as the previous target but with the new range. Until you put in the correct AOB and speed for the new target it will change the range and bearing based upon the old info. Of course, once the new info is entered you can simply take a new range and it will be fine.