Arrived at the boat and found the fresh water lines cracked or broken below the stantion/stand between slips A-5 and A-6. Called Yacht Haven Annapolis maintenance phone number to report the problem. Leak was stopped/repaired by the time that we returned to the dock. Departed Yacht Haven Annapolis. Sailed quietly in the mouth of the Severn due the gentleness of the winds. Close reached out of the Severn heading about 150d magnetic, past the entrance to Chesapeake Harbour and Lake Ogleton, past the Tolly Point Shoal, past "1AH", running on about 8 to 10 feet of water. The time being about 17:05, tacked about to a broad reach and turned into the Severn River aiming for the dome of the State capitol building. Left Hank driving while I went below to check on a few items. Jumped to the sound of the depthsounder alarm which is set for 6'. We were inside the mark for Horn Point with the mark abeam on the startboard side and about 30 yards distant. Immediately tacked and reversed course. Shallowest reading seen on the depthsounder: 4.3 feet. SailboatData.com report the draft of an Alberg 30 as 4.25'. Fortunately, we are lightly loaded with little equipment and no stores worth mentioning other than the diesel fuel and a flat and a half of bottled water in half liter containers. In rolling up the jib, managed to wedge the furling line in between the bottom of the starboard line drum half and the starboard half of the line guard. After some rolling, unrolling, tugging and pushing on a rope mananged to work it free. Still learning how to use the roller furler. Seems that gentle, perhaps very gentle, resistance should be provided to the "lazy" line(s) when furling (jib sheets) and deploying (furling line). Returned to Yacht Haven Annapolis.