Thousands of tonnes of fertiliser must be moved before rains threatens to destroy the cargo. A classic car dealer ships a load of vintage motors worth £2million. Documentary profiling the hidden army of workers responsible for keeping the world's cargo ships on the move 365 days a year. Written by Enzedder

In Rotterdam, two huge cubes are moved off a cargo vessel to a small barge. In Ipswich, 50 trucks are lifted, and in Portsmouth Second World War army tanks are transported.

A naval architect must move a £3billion aircraft carrier from a dry dock. Plus, it proves a tight squeeze shifting 300 tonnes of steel cable under a low bridge.

The pressure is on to export three offshore wind towers to safeguard a Scottish town's economic future. Plus, a 130-ton locomotive is winched onto a narrow trailer.

In Teesside, 75,000 tonnes of coal from the US must be unloaded in just three days. Plus, a new £15-million yacht must be lifted to a cargo ship bound for Greece.

In Oxford, 280 Minis must be loaded onto a train in just six hours. Bound for Southampton, they need to be loaded on ferries for export to China, Japan and the USA.

In Shoreham, 5000 tons of biomass are being shipped to power plants in Sweden. And in King's Lynn, the old power station receives a new gas turbine shipped in from Germany.

In Glasgow, a royal navy patrol vessel must be transported from the shipyard to the water. In Southampton, 600 tons of supplies must be loaded for export to the Channel Islands.

Across the globe there is a hidden army of workers keeping the world's cargo moving 365 days a year. Whether it's high value or high volume they'll do whatever it takes to ensure their cargo gets delivered on time and in perfect condition - in all weather, day and night. There are at least 20 million shipping containers crossing the world's seas at any given time carrying anything from lobsters to luxury sports cars. Mega Shippers gets exclusive access behind the scenes to Ports on both sides of the Atlantic to find out what it takes for the largest freight operators and shipping agents to deliver goods 24/7. From the delivery of an 18 million dollar super yacht to a 20 ton shipment of sweet potatoes - we'll watch ground crews on-load and off-load these precious, but very different cargoes - conquering monumental challenges from miscalculations to malfunctions. Written by Back2Back Productions

Across the globe there is a hidden army of workers keeping the world's cargo moving 365 days a year. Whether it's high value or high volume they'll do whatever it takes to ensure their cargo gets delivered on time and in perfect condition - in all weather, day and night. There are at least 20 million shipping containers crossing the world's seas at any given time carrying anything from lobsters to luxury sports cars. Mega Shippers gets exclusive access behind the scenes to Ports on both sides of the Atlantic to find out what it takes for the largest freight operators and shipping agents to deliver goods 24/7. From the delivery of an 18 million dollar super yacht to a 20 ton shipment of sweet potatoes - we'll watch ground crews on-load and off-load these precious, but very different cargoes - conquering monumental challenges from miscalculations to malfunctions. Written by Back2Back Productions