Originally published on April 26, 2009 How to brew beer in a coffee maker, using only materials commonly found on a modestly sized oceanographic research vessel has been one of our most popular posts. Over the past year, through experimentation and advice from fellow scientists and brewers, I’ve modified the recipe. The biggest criticism was that in order to make good beer, you needed to smuggle hops aboard. “Well, if you can bring hops aboard” they ask, “what’s to stop you from bringing any other brew supplies aboard?” The answer is nothing. So we went back to the brew pot, experimented with new reagents, and bring you now the definitive guide to brewing beer in a coffee maker, using only materials commonly found on a modestly sized oceanographic research vessel.