Chris Tibbs in Yachting World explains the best options for navigating through the doldrums or Inter Tropical Convergence Zone (ITCZ). The tradewinds of the northern hemisphere come together with the tradewinds of the southern hemisphere, this is the ITCZ. This transition can cause calms, sudden storms and light and unpredictable winds. The challenge is to get through the convergence without losing wind and avoiding sudden squalls. Read more.