In the 12 years since the first edition of this atlas was published there has been a marked intensification of the effects of global warming on weather conditions throughout the world. In this fully revised and updated edition the main focus is on all changes that may affect offshore voyages. One of the most noticeable phenomena is the gradual decrease in the regularity and reliability of trade winds, as witnessed by sailors on some of the frequently travelled ocean routes. However, the most significant and visible change has been the increased intensity and extent of tropical cyclones, both in the duration of the critical seasons and the areas affected. As this phenomenon has such a major impact on voyage planning, and safety generally, in order to provide a full perspective on the current situation, this atlas contains all relevant facts for every area of the world that is affected by tropical cyclones. The timing of the cyclone seasons is an essential factor in voyage planning, and one of the results of climate change is that tropical storms are now occurring outside the accepted timeframe and previously affected areas. The safety factor in voyage planning is now even more important than in the past. With careful planning, and by being aware of the consequences of climate change, tropical storm seasons, and critical areas can still be avoided. Bearing in mind the changed circumstances, these are the basic safety measures that should be adhered to when planning a voyage now or in the near future.