It really sounds like the RCN has to accept some reality, tie up some of the CFP, go to a double crew system. Where one crew sails for X amount of time, then the other crew meets the ship wherever and takes over, the other crew goes home, rests, family and courses. then people could plan their lives a bit better and not burn out. You really need about 2.5 crews per ship to allow for leave, courses and injuries. this is generally how the CCG and commercial vessels operate and it works.