My dad's done the trip across the Atlantic three times round trip in a 210. I was pretty young for the first two times, but just about to start my training for the third time. Going from Goose Bay to Narsarsauq, then to Reykajavic, and then on to vairous points. Our 210 has wing tip tanks installed for a total fuel capacity of 121 gallons. We also added a 55 gallon tank that went in place of the rear two seats. That gave us plenty of fuel for the 700nm over water legs and then three or more hours of gas. The last trip we made Chicago to Goose Bay non-stop (1317 nm or so). It took something like 8h, 10min into head winds. That's about twice what any of the over water legs was. We chose to go to Greenland if for no other reason than my dad loves mountains and we had great weather. Back when we went, we had to get inspected, however after two trips we got a waiver. Craziest thing I remember was on our return leg, descending into Narsarsauq....we're talking to the tower and trying to arrange for fuel....and we're racing a Traumahawk!!! I cannot believe that anyone would try one of those across the pond....but to each his own.