[Never tell Flint about that boat-naming contest that resulted in one being named Boaty McBoatface. He'll despair of humanity entirely and go live as a hermit in a fucking cave.]

Sailing - traversing oceans or rivers, I should say - is not as difficult as you might think. Primarily, it takes courage and and irreverence towards sanity, often in equal measure.

[He's more than obviously poking fun at himself, rather than delivering any especial caveats.]