Try out the link in post #8 before you assume nothing helpful is available.Back from practice dive this morning. I tried moving my arm rapidly from reach-down to reach-up, but was unable to trigger the rapid ascent alarm. Ah well.
I think it's a shame there aren't more accessible ways to practice these things. As the Hawaii missile alert recently demonstrated, there is value in being able to rehearse using technology in situations more realistic than just reading manuals, but without being anywhere near to an the actual live emergency situation
