Simon, It sounds like you may have developed a ucler in your stomac. This had happened to me last year. You should stop drinking booze! You need antacid meds to help clear it up ( like nexium ) since you are on a ship, if you can get over the counter stuff like otc or zantac? at least until you see a doc. If not, drink a little milk and take some tums. Do not drink, and or eat spicy foods or acid like foods. Hope that helps.

Rose