SOD-PUD-SUC-PUC

[Ben2000]

Hi all
Related to a previous post, can somebody help a bit more with the an easier way to remember this SOD-PUD-SUC-PUC? Are these right?

If the Pitot is blocked:

1. While descending, ASI would under-read, as it cannot register a change in the total pressure. I.e. you are likely going faster (higher density of air), but the ASI reads slower.
2. While climbing, the ASI would over-read, i.e. nose-up, but the pitot being blocked does not register a change, so while you are already IAS is steady, the speed may be slowing

If the static is blocked

1. While climbing or descending, the Altimeter and VIS should not register any change EXCEPT that the static instruments (at least the Altimeter) might register a small change from the cabin pressure.
2. I.e. the altimeter won't register any change, so if you are at 1000 ft, and then climbing it would under-read, and if you are descending from 1000 ft, it would over-read.
3. The VSI might register a small change and then return to zero.

Are these correct? Many thanks for the advice.