I'm not wishing to stray further from the thread subject, but mention of the old asbestos type fire-helmet reminded me that as a young J.O.S., whilst engaged in fire-drill at sea, I was often elected to don the smoke-helmet, gloves, with air-hose and communication line attached etc., (one tug, two tugs, the significance of each signal I no longer recall). For the purpose of the exercise I was required to confront an imaginary fire which entailed a great deal of movement. I recall that the helmet and attached 'shroud' was made from a rather stiff asbestos material and can only imagine that any movement by the wearer may well have induced the release of asbestos particles. Should this occur inside the helmet there was only one place it was going to go and that was directly into ones lungs. Nice thought. Have since wondered if this may have contributed to my emphysema, but rather think it was the 30-40 per.day habit I once had.
I, too, remember the dust that fell upon us when preparing to paint the asbestos lagging around internal pipes. As with the proximity of nuclear waste, there were any number of health hazards we as seamen were exposed to, most of which we were totally oblivious to at the time. Cynically, perhaps, but I've often wondered if our employers were equally ignorant of the health risks we faced, what do you think?.
........................................regards, Roger.