Going with the flow: drip loops
Everyone has to drill holes in bulkheads. On modern center consoles, the main reason is to run cables for electronics. Protecting the hole to prevent water intrusion is a classic rigging problem.
If you don’t care about removing the cable, you can seal the hole with caulk. If you want to be able to easily remove the cable later, the traditional way to protect the exit point is to attache a small, downward-facing clamshell cover, and add something called a “drip loop” (see picture below, left).
A drip loop is simply a downward curve in the cable just before it enters the bulkhead. Water splashed on, or running down the cable will naturally gravitate to the bottom of the loop and drip off, rather than run to the bulkhead hole and seep in. Simple, effective and definitely “low tech”. Admittedly, this was more important before we started using cable clams (see below), but you get the general idea.
Another variant of this is how we ran the cables for our VHF radio. When we first decided to mount our waterproof VHF on the side of our console, we ran the cables through a hole we drilled in the side bulkhead, and tried to use a Cable Clam to seal the hole.
But the cables were too bulky, and we never got a good seal. So we decided to take advantage of the air gap that was present on the rear edge of Toy Boat 2’s tilting console, and just routed the cables out and around the bottom back edge . This resulted in natural drip loops to keep any water on the cables out of the console (see picture below, right).