Anyway, my question is this. How do I calculate the time on the approaches(if applicable for that approach) for an IAS of 80kts?
The first thing to realise is that the timing is based on Groundspeed, not IAS, so you need to have an idea of what that might be. Looking at a Jepp Approach chart for a Non-Precision Approach (NPA) I see the timings are based on groundspeeds of 70, 90, 100, 120, 140 and 160 kts. So, if the g/s is 80 kts you can either double the 160 kt time , or interpolate bewteen the 70 and 90 kt times.
Not sure what you mean by the Aerodrome minimums - are you talking about something different to the approach minima depicted on the charts?
PS, there is probably more IFR experience on this site than perhaps you give credit for........
