Several very close call incidents in the last decade. This even before the recent major degradation of experience level of new joiners. Make no mistake about it, the quality and level of training at cx has always been very poor or non-existent. New joiners managed to pull themselves thru with the experience and knowledge they brought with them from elsewhere and keep it safe. That is how the operation was kept safe so far. Knowledge and ability level of new SO's is very very low. Scary low. I don't know who the hell is signing them off. This is an extra negative factor/hole in the swiss cheese. Add to this the increasingly fatiguing schedules of late/hole in the swiss cheese. The day is fast approaching when what happens will be too big to bury.
Call in Fatigued when in doubt to keep yourself from becoming a statistic.