Hello people,
A question re NADP. If you are flying a SID that requires you to accelerate to to 250kts ( if unable advise ATC) am still required to fly a NADP 1 or 2 or is the NADP not required in case. Thanks for your help in advance. Cheers FR

I would think NADP 2 is your friend for 250kt departures like ORD and ATL.

Depends on what the airport requirements are. Some airports require a specific NADP. If so, then the specified NADP is expected to be flown. It may also be runway specific. For example, ANC has NADP 1 required for RWYs 7L, 7R and RW 15. The airport doesn’t specify a NADP for RW33 or RW25 L/R. As such, it is up to the operator as to the NADP they use for those runways. Generally operators have a standard NADP they use, and only use the other NADP if airport requires. The SID has no relevance to the NADP. In your example, if no NADP requirement exists for that airport or runway, then NADP 2 would be the best option. However, if NADP 1 is required for the given runway, then it must be flown regardless of the SID requirement.

On the other hand, some planes will do the close in NADP1 to reach 3000 by 5 miles on the ORD 3.

Excellent point about ORD. Especially when we used 22L for departures (in times gone by).

Somewhere I have a T-shirt made for me that says “Benky at 11”.

^^^^^^ this