Hovercraft

In order to facilitate deployment of their forces in theatres of war, GDI extensively utilized hovercrafts. It is an amphibious vehicle or craft, designed to travel over land or water, supported by a cushion of slowly moving, low-pressure air, ejected downwards against the surface close below it and uses large, powerful propellers to skim over water and land with ease.

First Tiberium War
In the First Tiberium War the LCAC hovercraft (shown in the photo) was the most popular choice when deploying ordnance and men and was capable of delivering MCVs and even Mammoth tanks to shores to enter combat.

GDI
Following a period of inactivity during the Second Tiberium War, when they were replaced with Hover MLRS and amphibious APCs, the hovercrafts once again saw extensive use in the Third Tiberium War, as a heavily armored rapid deployment craft, which played an important role in the war against the Brotherhood of Nod, even transporting Mammoth 27 tanks, for example, during the GDI attack on Alexandria.

Nod
Similar in purpose to it's GDI counterpart, the Nod vessel has a higher carrying capacity than both the Carryall and the Ox Transport. It is designed to carry even very heavy units across long oceanic distances.

It is interesting to note that the vessel bares an uncanny similarity to rays; an order of cartilaginous fish related to sharks. Similar to the iconic Nod scorpion, many varieties of rays possess poisonous barbs on their tails.