Answer:
Doldrums are produced when trade winds converge.
Step-by-step explanation:
Inter Tropical Convergence Zone (ITCZ) commonly referred to as Doldrums by the sailors is the region around equator where calm, windless weather prevails.
ITCZ is caused due to the converging Trade Winds and the rising air. ITCZ is generally found along the equator, it keeps moving and follows the Sun's overhead position with a delay of 1-2 months. Doldrums region is considered favorable for the navigation by the sailors.