Quote Originally Posted by Frank S View Post
and the guy holding the ladder didn't know about the emergency manual lowering valve. or how to use a nail to push in the plunger on a solenoid valve.
Then again a lot of modern equipment are made in such a way that had he known how to do that the load holding circuit would have required pressure to allow lowering. In these cases there is often a small palm pump mounted on the control bank and a procedural guide for lowering the men to the ground.
Logical features, I'm sure some means to do so are a requirement. I'm hardly familiar with aerial gear; even starting from scratch how could such features not be information on the operators placard?