SUBSIM Radio Room Forums - View Single Post

ljqcn101 · 04-01-19, 07:55 AM

Download link: http://www.subsim.com/radioroom/down...o=file&id=5458

I decided to share my personal TMA calculator suitable for figuring out target course/speed/distance using bearing only information.

The calculator uses metric system and is particularly designed for Wolfpack.

It's an old school C++ console for quick input/output, so you enter parameters one by one according to the console display and then you got the results. (Source code: https://github.com/LJQCN101/Auto-TMA-console)

For example, I recorded 3 bearings at a 2-minute interval with my boat staying still using AP connected to TDC, so I can get some pretty precise readings from TDC heading dial: 321.3, 326.48, 330.9 in this case. Inputted into the calculator and got a target course of 32.8deg.

Then I moved straight forward for 935m with my heading 20deg, and took the 4th bearing 334.5 at time 8:30. Put them all into the calculator, and I got the target course 32.8deg, speed around 8 kts, distance 4716m.

The calculator is not limited to this situation and you are allowed to move and steer the boat as you want.

04-01-19, 07:55 AM	#1
ljqcn101 Sailor man Join Date: Jan 2013 Location: Hong Kong Posts: 50 Downloads: 78 Uploads: 3	Open sourced automatic TMA calculator Download link: http://www.subsim.com/radioroom/down...o=file&id=5458 I decided to share my personal TMA calculator suitable for figuring out target course/speed/distance using bearing only information. The calculator uses metric system and is particularly designed for Wolfpack. It's an old school C++ console for quick input/output, so you enter parameters one by one according to the console display and then you got the results. (Source code: https://github.com/LJQCN101/Auto-TMA-console) For example, I recorded 3 bearings at a 2-minute interval with my boat staying still using AP connected to TDC, so I can get some pretty precise readings from TDC heading dial: 321.3, 326.48, 330.9 in this case. Inputted into the calculator and got a target course of 32.8deg. Then I moved straight forward for 935m with my heading 20deg, and took the 4th bearing 334.5 at time 8:30. Put them all into the calculator, and I got the target course 32.8deg, speed around 8 kts, distance 4716m. The calculator is not limited to this situation and you are allowed to move and steer the boat as you want. __________________ Automatic TMA calculator (metric system) Automatic TMA line detector and solver for DW/SC/688i Automatic TMA line detector and solver for maneuvering target (new) Last edited by ljqcn101; 04-14-19 at 11:25 PM.