Its primary task is to help any one in need now.. The MCA release an asset if its not actively tasked.
Its a triage system if a higher task comes in it goes to that if its committed the next asset goes till none are left. .
Its just the way it is you cant have lifesaving skills sat on the ground waiting for a titanic to sink, while people die 2 miles down the road because we are a "seafarers" only service.