There's a large expanse of water called the Ijsselmeer which has a reputation for rapidly changeable conditions. It was however in our way so had to be done. Out we went from the sluis (lock) at Stavoren and two slightly choppy hours later, in again at the sluis at Warkum. As usual, Snail handled the crossing admirably so we were slightly taken aback when the Warkum lockkeeper treated us to a diatribe about the unsuitability of narrowboats, of which he must presumably know such a lot, for sea crossings and (the other end of the boating spectrum) for getting around tight bends. While he was regaling us with his knowledge, he deftly short changed our proffered 20euro note for his 5euro charge.