M113, MOWAG and BTR-60/70 Logistics.

Every army needs support!

Recovery, ambulances, engineering, bridge layers, ammunition supply, communications, and missile systems support radars.

Trucks are fine on roads of nearly all types because of four, six, and eight drive chassis, but when we come to mud and wet ground things change a bit?

The U.S. and its allies used the common components of the tracked M113 in all guises and this was the same for both Soviet/Russia with the mass build of the BTR-60/70 and a host of conversion variants. 

Being amphibious was a great breakthtough for the military cutting out the need for bridges and this has proved sufficient for some situations and not all, that is why armies have engineering corps?

But in recent years the MOWAG has become the new vehicle on the block and is now used by a whole host of nations perhaps more so than Russia and America put together?

Dredgers.

Sand and Mud.

Modern shipping cannot operate effectively without the deployment of ships that can remove sand and mud bars from river mouths and estuaries. Ships are getting bigger and heavier, they also are some times much larger under the water and now are more likely to scrape their hulls.

The dredging companies are usually under licences to clear and sell sand for commercial uses, where as mud is redeposited to other deep area of water.

Sand and mud flats are created by the under water currents and built up deposits from rain and flooding in rivers. I have filmed quite a number of boats that visit the Port of Swansea and work around the Bristol Channel ports. Arga Bay, Sand Heron/Harrier, Welsh Piper and Arco Dart.