As most of you know, I just got back from a short single-handed cruise on a borrowed Hinkley 41 named Sable. I hadn't single-handed in a while, and it's years since I spent any appreciable time on a boat other than Morgan's Cloud.
During the last two days of our mini-cruise, we (Sable and me) transited the Reversing Falls and Saint John Harbour, crossed the very tidal Bay of Fundy, and made two tricky approaches—one to a strait where the tide runs at over four knots—all of it in fog and with plenty of traffic around to keep it interesting.
Definitely a good navigation work-out, particularly with unfamiliar electronics. And busy enough that I was well aware of the potential for an accident if I "lost the bubble" for even a moment.
Here's some stuff I did to make that less likely: