MCR Watchkeeper is a duty watch that personnel in the MSE & CSE departments stand when they are alongside. As ex-dragoon stated, then monitor all the ships machinery systems as well as the damage control and supression system. The watch rotation is less than what is normally stood on the brow, but most ships are able to maintain a 1-15 to 1-20 rotation meaning you would stand a 24 hour duty every 15-20 days.