http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Part 1: Understanding Weather Systems. The first video deals with how areas of high and low pressure are formed, and how differences in pressure lead to the prevailing winds. The concept of air masses is introduced, with boundaries between them identified as the areas where much adverse weather originates. The formation of a frontal depression is examined in detail, as are other kinds of depression, including tropical revolving storms.
Waves represent a substantial physical hazard to a vessel. The package examines how waves are formed, and the dangers they present. The occurrence of freak waves is described. In conclusion other weather hazards such as fog and ice are also considered. This video includes interviews with senior meteorologists who describe how weather forecasting has progressed in recent years and how the earth's weather patterns might be changing. The advantages of using a weather routing service are outlined.