Just doing progress test topic 3… answers on P64… of the new edition, and I have a question .. who’s responsibility is it to ensure that all obstacles on the climb out path can be cleared by a safe margin….
PIC…? book answer states it’s the aerodrome operator…but the book references part 91 MOS chapt 24 para 24.02… and I’m reading it as PIC… maybe just a typo?

Your right it's a typo it should be (c)

A vexed question.

The answer is easy - Captain Speaking is the answer.

Now, the problems (and this stuff is my stock in trade as an operations engineer) -

(a) the pilot usually only has the ERSA data. This is limited to defined splays - which you need to know. Once outside the splays, you don't have any information unless you go looking for it all by yourself. (That's not entirely correct as you do have the lateral splays but they are of little use to the pilot directly.)

(b) the ERSA data sometimes is wrong (usually just typos) and there have been some clangers over the years.

(c) in Australia, the pilot theory exams barely scratch the surface of what you should know. UK Perf A for the ATPL folk is much better.

(d) for light aircraft, the Australian rule changes in recent years have made the whole thing very much a dog's breakfast and the pilot is hard-pressed to figure out anything much at all from whatever data may be in the AFM/POH. This is made all the more harder because Australia has a bunch of rules which don't apply overseas and, generally, won't be addressed in the POH.

So, how do YOU go about figuring out the obstacle clearances, especially once you are outside the RDS trapezoids ?