quite right chopjock
other considerations become the limit - like practicality, politeness, 500ft rule etc - but it would never be danger (unless you are doing it wrong)
helicopter you can go really slow and really low. So whats the problem?
precisely - and the answer to that is; some (30% ish) can't see when and how to start slowing and descending - the first thing they see is nothing and never really know why.
The lethal cocktail is to teach people enough IRF skills to kill themselves , not show them how to stay Visual , and to give them BBrule No.1 with 1500m as the magic number when any visibility limit is arbitrary and will not reduce risk. It's wrong.
cont//...
7 Treat the furthest thing you can see as the 'End of Your World' , fly as if landing just before the End of the World, if the EotW becomes further as you get closer then you can still plan on flying to the new EotW instead, if the EotW never becomes further then you will have landed before it.
(I am not against Instrument Reference Flight training for all tho' - it's just not the answer to preventing IIMC)