VMC
Flipster
Thank you for your detailed reply.
I have always been doubtful about COCISOS, would 100'/100 metres qualify??? I have vague recollections from my Air Corps service that there were additional limits imposed upon this and from more recent civilian service that the company I worked for imposed their own additional limits for overland and over sea flight. The need to stay more than 500' away from person/buildings etc meant that the practical minimum over land was 550'. A correspondent to this thread said that does not apply to the military.
Despite a lot of info over the past few days, I am still unsure which minima would have applied in the case in question