In geometry and architecture, triangulation[en.wikipedia.org] is the process of calculating a new point by forming triangles to it from already known points.

For the triangulation in the A10c we will need the HSI, RWR, CDU and TAD. Even though it looks like a lot of work, you can do it in a matter of 2 or 3 minutes once you learned all the steps.

Once you have a threat on your RWR, you first want to get closer to it. The closer you get to the signal, the more precise the triangulation will be.


You can either fly to the left of it, or to the right. In this example i fly to the right to get the SA-8 on my left beam.
Once the left and right corner of the diamond are on the beam you want to press the MK button on the UFC (red). This will create a markpoint on your current position.

Once you created your first markpoint, you need to set the arrowhead on the HSI (red) 90 degree to the left or the right of your plane. The arrow needs to point in the direction of your threat (if the threat is on your left beam, turn the arrow to -90 degree, if the threat is at your right beam, turn the arrow to +90 degree). You can do so by turning the Course Selector Knob (orange). Your offset direction will appear in the Course Selector Indicator (blue)



Now go to your CDU and press the OSET button (red) to get to the Offset page.



Insert the name of the first Markpoint. And press of the arrow key (red).



Insert the offset you got from the HSI and a number, that will serve as the distance between Markpoint and Offsetpoint (i usually use 100, so 100 nmi). If the Offset from the HSI is less than 100, you need to add a zero infront of it. In my case the bearing 14 has the input of 014. Do not put a space between the bearing and the distance between the points. Press the arrow key to the right (red).


Name your new Offsetpoint by typing in the name you wish and press the arrow key (red). Every point needs a individual name.

Now you need to repeat the last few steps. Turn towards the threat and get him back on the beam. It needs to be the same beam as before. When the left and right corner of the diamond are hitting the beam, press the MK button on the UFC (red).

Set the arrow head of your HSI (red) 90 degree from your plane and towards the threat and remember the new course.



Now type your new Markpoint in the CDU and press the arrow key on the left (red) to set it as the base for your new Offsetpoint.



Set your new offset course and the distance by typing them with the keys under the display and hitting the arrow key (red).



Again set a individual name for the point and press the arrow key to the left (red).

To connect the points, you need to put them all in a flightplan. To do that, press the FPM key (red).


Name your new flightplan and press the arrow key (red).



Press the arrow key on the right (red) to acces the flight plan.



Type in the name of the first Markpoint you set (in my case A) and press the arrow on the left (red).



Now add the first Offsetpoint (OFT11 in my case) and press the arrow key (red).


Add the second Markpoint (for me its B) and press the arrow key (red).


Your first page is now full. To acces the second page, use the PG key (guess what, its red).


Now add the second Offsetpoint (in this example OFT12) and press the arrow key on the left.

Press the FPM key again to get back to the flightplanmanager menu (red).


Now press the arrow key on the left of your new flightplan to activate it (in my case i have to use the arrow key in the red circle).

Make the MFD with the TAD on it SOI (♥♥♥♥♥♥ switch left/right long) and switch to EXP1 or EXP2 by pressing china hat forward short (once for EXP1, twice for EXP2).



Zoom out of the map until you see the X, two crossing lines that belong to the flight plan.
Move the cross in the center of the screen over the X and zoom in (HOTAS DMS forward) as much as possible to get more precision. When your on the X make a Markpoint with HOTAS DMS right.


Hook the new Markpoint with HOTAS TMS forward short, followed by HOTAS TMS forward long to create a SPI.



Go to your TGP and slew it to the SPI (china hat forward long). You can set the image to white hot with HOTAS Boat Switch aft. Change FOV with china hat forward short. Zoom in and out with HOTAS DMS forward / aft.