Water level sensor system that sounds an alarm when bilge water rises. Alarm can use one or two sensors.
12-volt float switch and dashboard gauge with visual and audible alarm.
How to rig a distinctive chime or beeper to keep you informed of your bilge pump's activity.
How a siphon in one of your pump hoses can sink your boat, and what the simple solution is.
Planked wooden boats can leak. Here's a widely-supported set of forums on building/repair, designs/plans, people and places, and other topics. There is a lot of advice here, and the chance to ask your own questions. You can also search the back issues index by keyword, then order the issue or find it in your library.