If you only had a jenny for power, what good would a lighthouse do apart from warning of the rocks that you will inevitably strike without any propulsion?
Edit: I was once in a somewhat similar situation, although on what was probably a bigger ship. Three days into a typhoon off the coast of the Philippines and being chased by a second typhoon, our main engine failed and we only had one of the three generators for electricity. We went broadside to the storm and waves were crashing with some force onto the windows of the dining room (about 8 m above the water line), which is where I happened to be. Anything that wasn’t bolted down was all over the place by this point. In the midst of the carnage, I saw a friend (who was 19 at the time) sitting quietly at a table writing to her boyfriend. Not because she thought she was going to die, but because she had already survived a shipwreck when she was 7, and writing to her boyfriend was the next thing on her agenda for the day. No great relation to lighthouses, but I thought it was pretty badass.
