NAVIGATION BRIEFING

There’s spray everywhere and your eyes are stinging. You are planing downwind in 20 knots of wind averaging 18 knots of boat speed and just as you are piling into the wave in front the tactician asks: “What’s the TWA (True Wind Angle) for the next leg?”

You want to use the deck screen so you can see the navigation programme that will give you the ‘tidally adjusted TWA’. You glance down just as a wave takes you unaware from the side and nearly knocks the screen out of your