I did some sums on this in an idle moment yesterday. A 15 tonne boat doing say 5 mph is about 2 metres/second, and so if the anchor brings it to a complete stop in say 1 second (let's allow for the rope to stretch a bit) then the tension in the rope while the boat is stopping will average about 30 kN or a weight of about 3 tonnes. (very crudely Force x stopping time = mass x velocity).
That does argue to me, for tieing up to the bow, and deploying from there on grounds of safety, and starting the boat to turn before the anchor bites. That will mean it takes quite a bit longer for the forward momentum of the boat to be reduced to zero, and that will reduce the force.