@Toby_Middleton Sorry to hear that you acquired 4 violations during your flight. Here are a list of the max speeds/altitudes that will generate violations:
- Taxi speed: 35 kts GS (Ground Speed)
- Below 10,000 ft: 250 KIAS (Knots Indicated Air Speed)
- Between 10,000 ft - 27,999 ft: 350 KIAS
- FL280 and above: Mach 0.86
There is also another speed restriction in effect that you cannot fly faster than 550 kts GS below FL400. This will lead to being ghosted if you do fly faster than the 550 kts GS.
It sounds like you were above FL280 if your KIAS was less than 250. Remember to focus on the Mach speed above FL280. Hope this helps answer any questions regarding speeds. Feel free to send me a PM if you have any additional questions.
Happy and Safe Landings!