Https://www.cargomaster.com.au/wp-content/uploads/2012/08/img_slider_05-564x350.jpgMajor or bulky cargo, like substantial motor vehicles, equipment, industrial sections, development products, and so forth, could be taken care of and shipped very easily via sea freight which isn't the situation for air freights. You can't transport significant and ponderous cargo in planes, while ships... https://shipping-containers-to-th43185.wikiconverse.com/4045394/sea_freight_shipping_for_dummies