其實 FOB = Free on board 通常只用於船運 (by sea), 但現在一般亦通用於空運 (by air), 只當作用不同運輸工具而已.
另外是本地費用如 CFS charge, document charge, terminal charge 等等的收費亦有所不同, 大致如下 :
CFS charge : By Sea=$198/CBM, By Air=$0.7/Kg(min$160)
Terminal charge : By Air=$1.72/Kg(min$60), this charge is not apply for sea shipment
Handling charge : By Air=$150/shipment, By Sea=Optional
Document Charge : By Sea=$150/set, By Air=$15/set
For more details about FOB, you may visit following website
http://www.fullin.com.hk/web/knowledge/incoterms.htm