He retired in March and bought the boat in April, a 24-foot center console he keeps on a trailer and launches at Remley's Point. He grew up on the water here. He also had not owned a boat since 1994, and thirty years is long enough for the details to go quiet on you — not the big things, the small ones. Which way the current sets under the Ravenel at half tide.

How often an impeller wants changing. Whether his flares are still good. None of it is hard. All of it is the kind of thing you either know cold or look up badly at seven in the morning with the truck in gear.

The AI First Mate holds the boat's whole life in one place. It read the engine manual and the hull manual and turned them into a maintenance schedule keyed to engine hours rather than a calendar, because a calendar interval is wrong in both directions for somebody who runs 40 hours one season and 140 the next. Impeller, lower unit oil, anodes, fuel filter, plugs, trailer bearings — each with the actual part number for his engine, and the date it was last done. Every receipt goes in.

When the telltale went weak in July he knew inside a minute that the impeller was four seasons old and had the part number in his hand before he called the parts counter. The trip planning is the part he uses every time. He tells it where he wants to go and it works the tide at both ends, which people forget are not the same — high water at Remley's Point and high water at Folly are far enough apart to matter, and the ramp he launches at gets thin at the bottom of a spring low. It reads the NOAA forecast and answers for his boat and his experience rather than in general: a 15-knot northeast in the harbor is a chop, and the same 15 knots outside the jetties on an outgoing tide is a different afternoon entirely.

It gives him sunset, a fuel plan with a third held in reserve, and a float plan he can text his wife. Twice this summer it told him not to go. The second time was a small craft advisory building behind a front he had not looked far enough ahead to see. It keeps the paperwork that only becomes urgent at the wrong moment.

Registration renewal, the required safety equipment for his length, and the expiration dates on his flares and his fire extinguisher, which were both out of date when it first asked. When the grandchildren started coming out, it built him a shallow-water run to the back side of Capers Island with the water depths and the turn points written down, and a short checklist for having kids aboard that he reads before every one of those trips. He is not embarrassed about the checklist. He was a supply officer for twenty-six years and he knows what checklists are for.

It also answers questions, which is the quiet half of it. What that light on the gauge cluster means. Whether the smell at the fill is normal. What a securité call on 16 is and whether it concerns him.

He can ask the dumb question at ten at night in his own kitchen instead of asking it at the fuel dock in front of three people, and that alone has changed what he is willing to try. And it is building him a record. Every service, every part, every hour, every trip. A boat with a documented maintenance history is worth real money more than one without, and in five years when he trades up, the file already exists.

Forty-one hours on the engine his first season. Three things caught before they became a tow, one trip cancelled that should have been, and no morning yet spent standing at the ramp trying to remember something. "It isn't that I couldn't figure any of it out," he said. "It's that I stopped guessing."