Improved: the Lock & Bridge Planner goes live, and your dates get their own page
The Lock & Bridge Planner now follows your boat while it's open, plans nights where you'd want to stop, and tells you about fuel. And Plan Around Your Dates is a page of its own: your season on one calendar.

Live while you're under way

Open the planner under way and it plans from where the boat is, refreshes every five minutes while the page is open, and says what changed since you looked. Your boat shows on every map and on the lock picture — "live · 2 min ago", or "last fix 3 h ago" — on by default; "Show my boat" turns it off. "Use my current speed" plans at your real speed over the ground; it appears only when the app has your boat's position.
The whole run at a glance
Above the days: "Whole run map" and, new, "Whole run locks & bridges" — every lock and bridge on one line, the days as bands (tap one to open that day), the nights as numbered pins, and your boat. On a phone the picture slides sideways inside its own box. Each day's map now shows the stops along it.
Nights where you'd stop

When a day ends near your next destination, the night is your next destination. Otherwise the plan prefers a marina or a wall with a fuel dock over an anchorage, and says why. On the first day, "Make … my next destination" sets that night as your next destination in one tap.
Arrive by a date

"See it day by day" from Plan Around Your Dates opens the planner with your date on it: "By Sun, Oct 11: arrives Wed, Oct 7 — 4 days to spare." And asking late in the day no longer shows an empty Day 1: the run starts tomorrow, and one line says so — "It's after dark (sunset 6:45 PM) — the run starts tomorrow, Fri, Oct 2, at 6:35 AM (your usual departure)." Before sunset, with too few hours left to make a day of it, the line reads "Too little daylight left today".
Fuel, from your own boat
With your cruising speed and burn in Settings, the planner says what the run burns: "Fuel for this run: ~203 gal". With tank levels from your boat it checks your range against what's on board, keeping 20% in reserve: to the first fuel at Paducah is 219 nm, and "You carry ~380 nm — 297 gal on board (tanks 63 %) … enough". Nights with fuel carry ⛽, and the longest run without fuel is named.
Locks, honestly
Waits come from the last 7 days of each lock's records — the "usual wait" — and the card says when the lock last posted. A commercial tow queue (some run to days) is shown but marked "not applicable to pleasure boats": you're planned at about an hour, a lockage between tows. A boat tied up waiting for a lock is shown waiting, not arriving. When a wicket dam is down, the lock says so — no lockage, no lift — and warns as soon as it's back up. The river's current is counted in the hours, and bridges are judged at your lowered air draft.
Plan Around Your Dates, its own page

Tools → Plan Around Your Dates. The dates you can't move — be somewhere by a date, time away from the boat, a start date — on one calendar, one box per day: "day 1" … "arrive", "spare", "⚑ be there". Under each, one sentence: "Leave Fri, Oct 2, arrive Wed, Oct 7 — 4 days to spare. Latest you can leave and keep your usual rest days: Sun, Oct 4." A date more than six weeks out gets one box a week, from its Monday. Add, change or remove dates right there; My Trip's Dates card links to it.