Working up a course to steer
In the previous module we have seen how the wind and tide can make a huge difference to the vessels water track and ground track. When we plot dead reckoning and estimated positions its ‘after the fact’, a way to calculate where we have ended up and work out our position. In this module we will be looking at Course To Steer which is a technique we can use to calculate a course to end-up where we want to be, taking the wind and tide into account.
We have covered a lot of the elements, like calculating tidal stream, plotting positions, bearing lines already and this part naturally follows from the previous modules. However, please be clear in your mind that course to steer is different from estimated position. The main difference is that in Course To Steer (CTS) we are calculating the heading we want to steer before we set off, rather than a Estimated Position (EP), where we are working out where we are after we have steered a course.