The Sub Buddy TADS Computer is unique as it’s the first time, angle, distance and speed disc on mobile devices - and as such doesn’t require the use of any specific PC game or any 3rd party mod. It's also unique amongst other similar discs because it has a second pointer that is used for fast underwater nav plot calculations. The TADS training video 14 shows how that second pointer is used to calculate the turn radius for underwater dead-reckoning navigation, and video 15 also goes on to show the chord length calculation.
The TADS Computer was inspired by discs such as the US Navy “IS-WAS”, multiple circular slide rulers from Silent Hunter 3 mods,
makman94's Manos Bearing Computer, and the CRP-5 and E6B flight computer slide rules which Sub Buddy's lead developer has a very long and intimate working knowledge of. As you’re of course aware, the rules, the order and the values are as such because of how the calculations need to work and to maximise accuracy. Whilst no one would ever claim any generic circular slide rule is a world’s first, we feel our TADS Computer is justified in that claim for the two reasons mentioned previously; we are most definitely unique amongst any other digital slide rule.
Thank you makman94 for your support in helping us understand slide rule formulas while Sub Buddy was in development. We have credited you in the in-app credits, as we said we would when you were in communication with us during its development. We also provide a link back to your SubSim profile page for people to check out your own contributions to the community.
Thank you also Pisces for your help with our advanced maths understanding, another person we happily credited in-app!
[Edited 8-Nov-2020 to state makman94's Manos Bearing Computer's full name. The original abbreviation to MBC was an oversight and we did not mean any disrespect. Our apologies to makman94 for this oversight, and thank you for bringing this to our attention.]