We see the boat from a distance - the orange of the life jackets reflected in the rising sun.
And as we draw closer, we can make out dozens of people crowded on board as it sets off from the shore, from a beach near Dunkirk.
There is no sign of any police activity on the shore, and there are no police vessels in the water.
Instead, the migrants crammed into an inflatable dinghy are being watched by us, on board a private boat, and the looming figure of the Minck, a French search and rescue ship that soon arrives.
The dinghy meanders. It's not heading towards Britain but rather hugging the coast.
A few of the passengers wave at us cheerfully, but then the boat starts to head back towards the shore.
As it nears a different beach, we see a police vehicle - a dune buggy - heading down to meet it.
Normal practice is for French police officers to slice through the material of any of these small boats that end up back on shore.
Two police officers get out of the buggy and wait. A police helicopter arrives and circles above, performing a tight circle over the heads of the migrants.
The police think they might be about to go back on to the beach; in fact, these passengers know that most of them are staying put.
The boat stops a short distance from the shore and four people jump out. As they wade towards the beach, the boat turns and starts to head back out to sea.
We see the two police officers approach these four men and have a brief conversation.
They don't appear to check the bags they are carrying and, if they do question them about why they left the boat, it is the most cursory of conversations.
In reality, these people probably don't speak French but they were almost certainly involved in arranging this crossing, which is against the law. But all four walk away, disappearing into the dunes at the back of the beach.
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Why do so many try to cross the Channel?
Channel crossings rise by 50% in first half of 2025
We follow the boat as it chugs off in the direction of Britain, carrying around 50 people.
The Minck returns to shadowing its progress, but its job is limited to offering help if the boat gets into trouble.
Otherwise, if the engine keeps working, then this flimsy vessel will reach British waters in a few hours' time.
(c) Sky News 2025: This flimsy vessel carrying migrants could be hours away from reaching British waters
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