If you lose steering approaching a jetty or during a crossing situation, the results could be fatal. Turn the wheel lock-to-lock in the slip. Do you get the same number of turns you’ve always had? (Write it down!) Perform the same test under way, feeling for mushiness, flat spots and resistance. The fix could be as simple as greasing a cable or adding fluid. Then again, a mechanical breakdown might be imminent. Investigate.
Caulking and fasteners don’t last forever. Once the boat is in the water, make a thorough inspection of all through-hulls, engine and drive train bolts, exhaust runs, drive seals, swim ladders, platforms and more. If you find a leak, you may have to haul the boat to fix it. Generally, this is the preferred alternative to becoming a scared man with a bucket 12 miles from the beach.
There are those who would argue that marine electronics, the generator, the air-conditioner, the washdown system and more are not critical systems. I might agree. But I would counter that we depend upon these things and expect them to work without giving them much thought. Consider how long it would take water from a broken livewell fitting to fill the bilge or how much time your escape plan would require in an electrical fire caused by too much resistance. Energize every accessory to see what’s what.
Vigorous maintenance is integral to good seamanship.