You might think stress-free navigation sounds like an impossible paradox. But it need not be. All boaters, whether under sail or under power, need to be able to navigate safely on the water - both to keep themselves and their crew out of trouble and to avoid endangering others. Yet navigation has often been presented almost as a black art - complicated, full of tricky maths, and with alien concepts to get your head around. Step in 'Mr Stress-Free':...