Midnight,
Unfortunately its you guys that are doing 240-260+ hrs a period. Its unfortunate as it has potential safety issues and health issues.
Despite you guys complaining to your colleages on board(aus based and NZ based) you continue to turn up and do it without question.
It may be prudent to promote you guys to CSM or CSS as you will likely do anything you are told, without question. On the other hand it may be less prudent based on your decision making abilities as illustrated above.