Then maritime ports of Chittagong, Cox’s Bazar, Mongla and Payra have been advised to hoist local cautionary signal number three as a deep convection is taking place over the North Bay, reports UNB. Squally weather may affect the maritime ports, the North Bay and adjoining coastal areas of Bangladesh, a Met Office bulletin said. All the fishing boats and trawlers over the North Bay have been advised to remain close to the coast and proceed with caution till further notice.