We left the dock at 8am on monday morning. Once we were out of the channel we went to our normal cruising shifts. Everything was going pretty smoothly till tuesday night. I went down to check the port engine room. I saw water spraying out from around the propeller shaft and the water was already at foot and a half deep. It was all the way up to the bottom of the engine and the gearbox. I went and alerted the crew then went back down to the engine room. I shut the engine down then located the source of the leak. Our propeller shaft dripless seal had failed. Lots of water was pouring in. I was able to clamp the two parts together with my hands to stop the water till the crew and engineer could come down to help. Once help arrived Don and I worked at stopping the leak with clamps and the crew got to work pumping the water out. It looked like there was no damage to the seal, it had just come loose for some reason. We worked all night and the next day to try and get it back together. But everything had to be perfect to get a good seal. We didn’t have all the tools or knowledge to do this on our own. So we had the technician that installed the coupling while we were in the Tampa shipyard come to Fort Myers to meet us. We picked up the tech in our small boat and brought him out to the ship. With his help the three of us fixed the seal. We did a sea trial and then brought the tech back to Fort Myers. After that the rest of the week went pretty smoothly.