Math??

[Donkey-Shot11]

Hi all,

Is there any math savvy person around here who knows what the math behind behind plotting a target's course, speed and/or AOB is?

I'm pretty sure I need the folowing date:
- own ship course, own ship speed, multiple target sightings (bearig, range + time)

But how do you do actual calculations?
Why do I ask?
Two reasons:
1, I wanna pick up on my math skills
2, I wanna make an excel spreadsheet to use on my laptop while I sun SH on my pc