In Indonesian jets, most pilots smoke during flights, as smoking is allowed on most airlines where the duration is over 1hr. One condition is that the ashtray has to be secured. Captain will say when to put the ciggies in the ashtray. on the 732, middle jumpseater must not smoke as soon as the plane is entering base leg or in case of direct approach, when they switch to tower freq because it's ashtray cannot be secured. Below 500 feet, ashtrays must be secured. Funny eh ? Policies vary between companies. Most of them still allow cockpit smoking during cruise.
When losing situational awareness, pray Cumulus Granitus isn't nearby !