As seen in episode 5 of season 6, we can see
Theon and Yara Greyjoy escaping the Iron Islands before Euron Greyjoy gets crowned King and will most likely slaughter the competition.
A friend and I are arguing over a piece of detail regarding this event. On a shot, you can glimpse at
3 rowboat and a handful of men running towards them with our two protagonists.
The thing is that a few minutes later, we can admire this view:
There is no way this small amount of men managed to get them running alone, or maybe by towing them.
What I think is the beach shot was only an overview of the men going to the boats (most likely for budget reasons too), and that quite some Yara loyal men were already on the fleet ; but he believes that the image only shows something like 3 boats of Yara's army along with others that are parked here for some reason or not part of the escape, like fish boats maybe.
A bit after in the season, we learn that
The two Greyjoy offers Daenerys a fleet of 100 boats
confirming that the image seems to represent them, but it doesn't answer the question of how they managed to run them all.
So how did only a handful of sailors man 100 ships?