Discussion Question: Air Freight vs Sea Freight

Discuss the criteria determining whether a company should source its materials and move its products via Air Freight versus via Sea Freight. To be considered substantive, your reply should add significantly to the discussion by building on others' comments, pointing out similarities or differences in your backgrounds or course expectations, etc.  One or two sentence responses such as "Hi, welcome to the course!" or "I feel the same way" are not acceptable.  

250 words!