Heavy losses among the barges would leave far fewer vessels available for the second night's crossing unless the invaders captured a port. The tugs would also have to wait for powered barges to unload and come back out. Unpowered vessels would remain through the day before they could be taken back. The first landing's transport problem therefore extended into recovery and reinforcement, with the same craft needed again.
Notable Point · 31:53-32:36
Recovering the barges needed for the second wave
The transport force had to survive unloading and return across the Channel before it could bring the next wave.