Second, sailors go on deployments, all the time. I am not advocating four months in Halifax, but three. The river and gulf are OK up to mid December and opens up in the first few weeks of March. And I am not advocating that the ships be taken over by Halifax based personnel while in Halifax. They would retain their crew. So lets say the few ships that are not ice strengthened (the RCD, which should be one or two, depending on long refits schedule) sail mid December for Halifax. They get there and go right into Christmas leave period for three weeks - in two shifts of 50% personnel, retaining whom they need for reasonable harbour watches on the one or two RCD. That brings us basically to two months in before going back home and to exercise with the rest of the fleet. Not exactly a home busting amount of time, especially if there are a few long week-end (Qc-Hal is 12 hours drive - two drivers - easy to do. I've done it when I was in Halifax and my parents lived in Quebec city).