Mechanical Riddles

Imagine you are slowly motoring down a Dutch canal and suddenly the inside of your boat begins to smell like the inside of a 10 day old cadaver that's been left in the sun.   Hummm, have you snagged a dead cow on your prop or does the dog have a horrendous case of gas? 

Oh, maybe it's neither; maybe your boat's batteries are frying and giving off explosive battery gas.  Nothing to worry about except, of course, money.  We all know what b-o-a-t stands for: Bring Over Another Thousand and in this case how true it is.  

The Noord-Willemskanaal

 One of the 7 million bridges on the Noord-Willemskanaal

but not the one that was broken and held us up for an hour.