People who work in marinas with rack storage, that's who.
Ever think about that?
I watched for a while. I was impressed. This gives you the general idea if you just pretend it's different boats, not the same one over and over again, with the owners all sitting around waiting to get going on their holiday fun. I didn't time it but it was a matter of minutes for each boat.
On the same day, where did not one single boat get launched (or burger get grilled, or cold drinks get sipped, or river breezes get savored)?
At the boathouse or the barge at Pier 66 in the Hudson River Park, that's where.
More on that when I have a little more time.