With my metalligust "head on"
I fundamentally disagreed with BSAC's position on not adopting the 1 year vis. 5 year hydro is acceptable .
They use phrase's like
" [They ]believe that an increase to annual visual examination is disproportionate and would have a negative impact on the participation in our sport."
and
"is a socially acceptable risk"
In the UK most divers use Steel cylinders. they dive very infrequently, 20 dives a year would be good going. Thus most cylinders are stored for the vast majority of the time. It only need one bit of moisture to ingress into a cylinder and it will have a huge impact. Especially in 2.5 years.
Their real bone was saving divers the cost of an annual vis. In the great scheme of things not a huge cost. Especially when most clubs can inspect cylinders "in house" for free.
While it will reduce the cost for the diver, it mean that they won't be going in to their local dive shop so frequently. Double edged sword
Here we use the 1 year vis and 5 year hydro and I'm more than comfortable with that.
While BSAC does have a lot going for it, it's club model has as many problems as it does advantages.