Scene: a company Christmas party in Boston many years before we bought the boat. Wife and I are well into our second glass of wine, chatting up a couple who a year before bought their boat. They've just announced they are quiting work in the spring, selling the house, and moving onto the boat permanently. In my wife's eyes, they're experts. The conversation goes something like this:
My wife: "I'm comfortable with coastal trips but offshore makes me nervous. I've heard that there are 'rogue waves' that can swamp a boat".
Jack (the guy who's going sailing): "Awh..., you don't need to worry about 'rogue waves'. You can see them coming and you turn the boat to take them bow on. What you really need to worry about are 'rogue troughs'. They can sneak up on you."
My wife: "Rogue troughs?"
And turning to me, she continues: "You never told me about that"!
Jack: "Oh yea! They're really dangerous!! They're the opposite of rogue waves, but they only occur on flat calm days. You're out there motoring along 'cuz there's no wind, of course --- and all of a sudden... the water drops out beneath you and you fall into the tough. It can swallow a boat in seconds. There's no way to escape."
My wife, looking at me: "I'm not going!"
Me: "Thanks, Jack!"
At the time it was not funny, but Jack and I still laugh about it today.
Jack and Laurie are now in their 10th year of crusing and to my knowledge they've never encountered a rogue trough. For that matter, neither have we.