My boat didn't come with a bulkhead heater, and though I plan on eventually purchasing and installing a diesel heater, for now I have bupkis. While docked I simply heat my cabin with a small space heater (which works magic!), but if I want to go cruising and anchor out one night, I need something which will not draw electricity. I have a two burner kerosene stove, and I've heard that putting a terra-cotta pot over a burner is an effective way to heat the cabin. Does anyone have experience with such a thing? I'd obviously pop a window to vent the cabin, allowing me to do that whole breathing thing. Ideas? Advice?