This is informative: Those boats in Texas paraded at the wrong speed

So 5 miles per hour would have been ideal, just fast enough to maintain manoeuvrability. That’s in fact what the Slow No Wake navigational cans in harbours often dictate. At 10 miles per hour, you’re not planing yet. But you are closer to maximum drag, and therefore maximum wake. The Lake Travis boat parade was too slow to plane. But it was fast enough to kick up waves.

(Do US boats' speed instruments actually use mph?)

I was amused by the political points:

• Elite Democrats go sailing.
• Elite Republicans go fishing.