Okay, I'll be a bit more specific regarding my doubts.
Q405)
I also would consider the 3 minute answer correct, but one condition isn't met for it to be 3 minutes. Yes it's true that the longitudinal separation minima between aircraft
departed from the same aerodrome and following the same track, and the preceeding aircraft is maintaining a true airspeed of 40 kt or more faster than the succeeding aircraft, is 3 minutes but given that the navigation aids permit frequent determination of position and speed. Perhaps I'm being to picky with the questions but that would be the correct answer then.
Q290)
Can someone explain what they mean by "including an amendment services"?
Q276)
What is the frequency 2.182 Khz used for? I know that 121.5 Mhz is the civil distress frequency, 243.0 Mhz is the military distress frequency but unsure of 2.182 Khz.