It says 100mph.
Imagine what it would be like to be lying down in bed watching TV, eating a sandwich and drinking a cold beer while the girlfriend is at the helm flying through the ocean swells at 100mph?
Honey, could you slow it down a bit? My eyes can't remain on the screen, my beer is spilling, my sandwich is about to fall to the floor and I'm afraid you're going to kill all of us!!!
"I have marveled often at the thin line that divides success from failure and the sudden turn that leads from apparently certain disaster to comparative safety." Ernest Shackleton, Antarctic Explorer, Sea and Land, 1874-1922.