The 19 angler has fixed fuel tanks and, as currently manufactured, has a 46 gal fuel capacity. The 16 has portable tanks and comes std. with "up to 12 gals capacity". In heavy seas, with most any motor you will put on a 19, you should conservatively figure 3NMPG (you'll probably get better and trolling will use very little fuel unless you're trolling at >6kts). With the 16, you might get 6NMPG but to be conservative plan on 5. So with the stated fuel capacity, the range of the is a conservative 138NM while the 16 is a conservative 60NMPG. In principle, you could put more fuel in the 16 (and for that matter the 19 too), but there's not a ton of space in the cockpit of a 16 especially when you think of the cooler you need to store ice and the fish. Also, the 19 will be a much more stable boat for those off shore trips. To me, if you really want to fish that far offshore, and your choice is between a 16 and a 19, the answer is clearly the 19. BTW - if you are looking for used, earlier versions of the 19 had a fuel capacity of 40 gals (two 20 gal tanks) and used 19's are hard to come by (many more 22's were made).