The most valuable thing I own from four seasons cruising France is not the boat. It is a stack of cheap A4 hardback notebooks, salt-stained and curling, that hold every passage I have made. People think a logbook is bureaucracy. It is the opposite: it is the one document that is part legal record, part navigation tool, and part the only honest diary I have ever managed to keep. Here is how I keep mine, and why you should bother.
The legal bit, which is real in France
Start with the fact most British and visiting sailors miss: in France a logbook is not optional once you go offshore. The rules attached to French pleasure-craft safety equipment make a logbook a mandatory document for any vessel sailing more than 6 nautical miles from a shelter. Inside six miles you can run without one. Cross that line, in the categorie that French regulation calls semi-hauturier or hauturier, and the livre de bord is required kit alongside the flares and the liferaft.
There is no prescribed format, which trips people up. The law does not hand you a template; it requires that the essential information is correctly recorded. That means the spatio-temporal basics above all: the time and place you departed, the time and place of any stop, and the time and place you arrived. Get those right and you have satisfied the spirit of it. This matters if you are cruising on a foreign flag and want to keep the Gendarmerie Maritime checks of your boat documents painless, because a tidy log is exactly the sort of thing that makes a boarding officer relax.
What actually goes in it
Beyond the departure-and-arrival skeleton, a working log carries the information you need to navigate and the information you would want after an incident. Here is what lives in mine.
- The crew aboard for the passage and their roles, which the French guidance specifically expects you to list.
- A position, course and log reading at regular intervals, hourly on a coastal hop, more often near hazards. On a tidal coast this is your dead-reckoning backstop when the electronics die.
- The weather, honestly recorded: wind, sea state, barometer, visibility. The note should reflect what you actually saw, not what the forecast promised.
- Engine hours, fuel and water levels checked, and any maintenance done or fault found. This is the running health record of the boat.
- Times of waypoints, tidal gates, course alterations, and anything you saw that you might need to recall: a ship that crossed close, a missing buoy, a fishing fleet.
The discipline that makes a log legally useful is simple: write entries as soon as practicable after the event, never reconstructed days later from memory, and never erase. If you make a mistake, strike a single line through it so the original is still readable. A log full of correction fluid and back-filled entries is worthless as evidence and, frankly, as a memory.
The log as a navigation tool, not a chore
Here is the part the legalists miss. A real-time log is how you stay found when the magic boxes fail.
I learned this in the Chenal du Four off north Brittany, where the tide runs hard and the GPS picked an inconvenient moment to lose its fix. Because I had logged a position, course and time every hour, I could lay off a dead-reckoning position in under a minute and carry on safely until the plotter came back. The log turned a heart-stopping moment into an inconvenience. On a coast with tidal ranges over 10 metres and streams that gallop through narrow passages, that backstop is not nostalgia, it is seamanship. It pairs naturally with the homework I do before any tricky passage, the kind I describe in choosing a Channel crossing weather window: the plan goes in the log before you slip, so the log is also your passage plan.
A logbook also catches the slow problems. Reading back a season of engine hours and fuel burn told me my consumption had crept up, which turned out to be a fouling prop long before it became a breakdown. The boat tells you things in the log that it never says out loud.
Make it one you will actually keep
The reason most cruisers abandon their log by July is that they made it a misery. The trick is to make the daily entry take 60 seconds and the writing-up a pleasure.
I keep two layers. The hard log is a waterproof-ish notebook at the chart table for the formal entries: times, positions, weather, the legal skeleton. The soft log is the same book at the back, or a second one, where I write the human stuff each evening at anchor: the dolphins off Belle-Ile, the row about the anchor, the price of the oysters, the name of the fisherman who sold them. The hard log keeps you legal and safe. The soft log is the one you will read for the rest of your life.
Cheap and analogue beats clever and digital here. Phone apps drown, batteries die, and an app cannot be slapped open on the chart table with one wet hand while the other holds a course. A 5 euro hardback and a couple of pencils, kept dry in a freezer bag, have outlasted every gadget I have tried. I do photograph each page on a marina night and back it up, the same five-minute habit I use for everything precious aboard.
Build the habit so it survives August
Good intentions die in high summer, when the cruising is busy and the evenings are social. The way to keep a log going is to lower the friction until skipping it is more effort than doing it.
I keep the hard log open at the chart table with a pencil tied to it, so an entry never waits on finding a pen. The formal columns are pre-ruled so a passage entry is a matter of filling boxes, not composing sentences: time, position, course, log, wind, sea, barometer, remarks. Sixty seconds an hour, no thought required. The instrument readings I want, speed over ground, depth, the engine hours, I note at the same moment so I am not hunting for them later.
The soft, human log I write with a drink in my hand at anchor, which is the trick: I made the diary part of the reward at the end of the day, not a duty before bed. Some evenings it is three lines, some evenings a page. Either is fine. What matters is that the book gets touched daily, because a log with gaps loses both its legal value and its charm. A season with no missing days is a season you can defend to an insurer and relive on a winter evening, and it costs you a minute an hour and a few quiet sentences at dusk.
Why the season-long view is the gift
A single passage log is useful. A whole season of them, read back over a winter, is something else entirely.
Mine tell me, with dates and numbers, how my judgement improved: the passages I would not attempt in year one and ran easily by year three, the weather I learned to read, the tidal gates I stopped getting wrong. They are the only objective record of how a cruiser actually grows. They have settled friendly arguments about where we were and when. And once, a precise weather and position entry was exactly what an insurer wanted after a minor incident, which turned a dispute into a quick settlement.
The log even shapes future plans. Reading back when and where the weather worked told me, over three seasons, which months actually delivered on which coast, and that data quietly fed into my French sailing season decisions far better than any pilot-book generalisation. Your own logged experience of a coast is worth more than anyone else's averages, because it is yours, in your boat, with your tolerance for a lumpy day.
You do not have to be a romantic to keep a log; the law in French waters beyond six miles requires the bones of one anyway. But keep the full version, the legal skeleton and the human diary together, and you end up with the single most valuable thing a season afloat produces. The view changes every day and is gone by evening. The log is how you keep it.
