The first time I took my own boat across, in June 2009, I spent more energy worrying about ships than about the actual sailing. That was the wrong way round. The shipping is manageable once you understand the rules. The thing that will catch you out is the tide, and almost nobody who has only sailed the Solent takes it seriously enough on a first crossing.
So here is how I plan a Channel crossing now, after roughly thirty of them, most from the central Channel ports.
Pick your route by where the tide does the work
The Channel is not one crossing, it is several, and they behave very differently.
The central crossings are the friendly ones. Solent to Cherbourg is about 65 nautical miles from harbour to harbour, or roughly 60 miles on the Needles to Cherbourg west entrance track. A typical 35-foot cruiser sails that in 12 to 15 hours. The shipping you cross sits in a band about 15 miles wide and you can take it at a sensible angle. I cover the detail of that passage in the Solent to Cherbourg piece, because it is the one most people do first and it deserves its own write-up.
Further west the distances grow. Plymouth to L'Aberwrac'h is around 100 miles of open water, which means a committed overnight passage rather than a long day. That route puts you straight into Brittany and skips the Channel Islands entirely. If north Brittany is your goal, the Plymouth to L'Aberwrac'h route is the honest direct line.
At the eastern end everything compresses. Dover to Calais is barely 21 miles, but you are crossing the busiest shipping lane in the world at its narrowest point. Short does not mean simple. The Dover Strait traffic separation scheme needs its own approach and I would not treat it as a beginner crossing despite the short distance.
The point is this: choose the route that lets the tide carry you toward your destination for most of the passage, not the one that just looks shortest on the chart.
The tide will set you 20 miles sideways if you ignore it
This is the part Solent sailors underestimate. Inside the Solent the streams run a couple of knots and reverse politely. Out in mid-Channel, and especially on the French side, they run harder and they do not cancel out the way people assume.
On a 12-hour crossing you get roughly one full tidal cycle, so the rough idea that the east-going and west-going streams balance has some truth to it. But it only works if your boat speed and your departure time line up. Leave at the wrong state of tide and you can be set 15 to 20 miles down-Channel of your intended landfall, arriving tired, off your transit, and closing a coast you do not recognise.
I work it the old way: lay off the tidal vectors hour by hour from the almanac for the whole passage, sum them, and apply the total as one offset to my course to steer. Then I cross-check against the plotter underway. The almanac stream figures and the chart agree; the trick is doing the sums before you leave, not at 0300 when you are cold.
Pay particular attention to the western approaches to Cherbourg and to anything near Alderney. The streams off Cap de la Hague feed the Raz Blanchard tidal gates, where springs can run to 9 or 10 knots. You do not need to go through the Race to be affected by the water pouring into and out of it.
Departure timing: leave to arrive in daylight, on a fair tide
My rule of thumb for a central crossing is to time arrival for daylight and a rising tide at the French port, then count backwards.
A lot of the Normandy and Brittany harbours have tidal access. Saint-Vaast-la-Hougue has a gate that opens roughly two hours before to three hours after local high water. If you read the Saint-Vaast-la-Hougue lock arrival notes you will see why turning up at the wrong state of tide means anchoring off and waiting. Cherbourg, by contrast, is open all states of tide behind its enormous breakwater, which is exactly why it is the standard first landfall.
For a 13-hour passage arriving at, say, 0900, I leave around 2000 the evening before. That puts the busy shipping crossing in darkness, which sounds worse but is actually easier: ships are lit, AIS targets are obvious, and the closing geometry is clear on the screen. Reading about a night crossing of the Channel will reassure anyone nervous about doing the lanes after dark.
Crossing the shipping lanes without drama
The shipping is governed by Rule 10 of the collision regulations. The single most useful thing to know: a vessel crossing a traffic separation scheme shall cross on a heading as nearly as practicable at right angles to the direction of traffic flow.
That word, heading, matters. You point the bow across at 90 degrees to the lane. You do not steer a course made good of 90 degrees, because then the tide swings your heading round, you spend longer in the lane, and to a watching bridge officer your intentions look ambiguous. Cross on a square heading and accept that the tide will skew your track. You will exit the lane faster and everyone reads you correctly.
A few practical points that have kept me out of trouble:
- A sailing vessel or a boat under 20 metres must not impede a power-driven vessel following a lane. We give way, full stop. Do not argue the point with 200,000 tonnes.
- Plan the crossing of the lanes for a window with a decent gap in traffic. AIS lets you see the pattern an hour ahead.
- If a ship is going to pass close, alter early and boldly so the alteration is obvious on their radar. A 5 degree nudge is invisible. A 30 degree alteration at three miles is a clear statement.
- In the central Channel the lanes are off the Casquets, northwest of Alderney. Know where they are relative to your track before you sail.
Weather: the window matters more than the boat
I have crossed in a tired 28-footer and turned back in a well-found 40-footer. The boat was never the deciding factor. The forecast was.
For a comfortable central crossing I want wind no more than Force 4, ideally on or forward of the beam, and crucially I want wind against tide avoided in the strong-stream areas. Wind over tide off Cap de la Hague turns an ordinary Force 5 into a genuinely unpleasant sea. The detail of choosing the window is in the Channel crossing weather window article, and it is worth more of your attention than the kit list.
Get the window right and the Channel is a long, satisfying day sail with a foreign breakfast at the end. Get it wrong and it becomes the story you tell nervously for years.
Before you go: the paperwork
Since Brexit the admin is not optional. You need passports, the boat's registration, evidence of VAT status, and you must clear in at a designated port of entry. Cherbourg, Saint-Malo and Roscoff are all proper entry ports. Read the clearing customs when arriving in France by boat guide and check the Schengen day-count rules before the season, not on the pontoon.
The crossing itself is the easy part. The tide and the timing are where the seamanship lives. Sort those out at the chart table and the Channel stops being an obstacle and becomes the gateway it has always been.
