I use my 70cm / 2 m co-linear mounted on the gable end for my reception. I just swop connections for either marine reception or working with my 2 m / 70cm rig.
My normal sea range is around 50 miles, but bear in mind that I'm already 15 miles inland, so total 60 - 80 ish from here is the norm at this time of year. If there is a Springtime lift on, anything can happen! I've watched traffic in the Dover Straits, I've watched the Cunard and Fred Olsen cruise ships all the way from the Solent to 100 miles north of here when on their Norway destinations. I think that my record was 250 miles from the home QTH, but these lifts can decay quite rapidly as the temperature changes, so can easily be missed if you are not in to start with! Conversely there are some really grotty days, like today for instance, when I'm lucky to see 40 miles from here, i.e. 25 out to sea.
It is also interesting to note that there are a few berths that I cannot never see, despite picking up stuff much further out, much depends on conditions at any one time.
Peter