Tropical cyclones are triggered by latent heat, water condensation and cloud for- mations. These can be monitored and, to a degree, patterns can be predicted so that shipping is forewamed and can take appropriate measures The majority of contemporary cruise ships, with the odd exception, are designed for cruising in relatively benign conditions and, therefore, itineraries are influenced in part by wrathnr nattrme cvrlmnes can create winds in excess of 120 kilometres(75 miles)