Saturation Dive Support Ship DSV Skandi Arctic is the biggest and newest saturation dive support ship, the mother ship for aquanauts working hundreds of metres below the surface in some of the world's most dangerous jobs; see her in action on a gas pipeline repair in the North Sea.

HDMS Absalon, one of the most modern warships in the world, has set sail to stop modern-day pirates off the coast of Somalia.

She's the biggest, meanest, most lethal weapon in the arsenal of a global power. The USS Nimitz, like the whole US Navy, has to be ready for any mission, anywhere in the world. That's why she undergoes a rigorous - and often dangerous - evaluation before every deployment.

Tyco Resolute has one job: to keep the world wired. She installs and maintains the undersea cables that form the backbone of the Internet, and right now she needs to connect a nation in need of a 21st-century upgrade. Hop aboard as she lays fiber optic cables off the Pacific coast of Costa Rica, a mission that's anything but simple. Malfunctioning cables and equipment, pounding surf, and low tides have put Tyco Resolute way behind schedule. If she doesn't pick up the pace, the entire mission will be in jeopardy.

She is the largest sailing yacht in the world, a sleek, five-masted luxury sailing yacht that's large enough to pamper and yet small enough to tuck into tiny harbors and hidden coves where no one else can go.

For the first time, our crews venture inside a shipyard to follow the construction of the world's newest mega-cruiser from keel-laying to sea trials.

USCGC Bertholf was built for U.S. Homeland Security to patrol the high seas, looking for drugs, weapons, human trafficking, piracy and traditional search-and-rescue missions; join her on patrol in the dangerous waters off Colombia.

T-AKE Military Supply Ship USNS Robert E. Peary is a T-AKE 5 supply ship, built for 21st century warfare; join Peary on active deployment in the hot zone of the Gulf of Aden, replenishing a fleet of 20 warships.

Unlike most cruise ships, the Becrux is a mighty ship made for four-legged passengers. With a capacity of nearly 20,000 cattle or 60,000 sheep, the Becrux is the largest custom-built livestock carrier in the world.

With the ability to ferry 8,000 luxury cars, heavy trucks and tractors from one continent to another, the Faust is the biggest and the newest ocean faring vehicle carrier on the planet.

She is built to haul more cargo faster, using less fuel than any other Laker. On this voyage she transports grain across the world's largest inland waterway.

Step aboard the Emma Maersk for a glimpse at the adventures of the crew on a two-week, 13,000-kilometre crossing from Malaysia to Spain. At 20 storeys tall, this ship is capable of carrying millions of dollars worth of cargo.

Climb aboad the CGCS Henry Larsen as she does an ice patrol around the sub-zero waters of the Notre Dame Bay area of Newfoundland and Labrodore. Built for the cold, she is capable of the year-round operations in the high Arctic.

The Roll-On/Roll-Off (Ro-Ro) ship North Star is one of the only links between Alaska and the continental U.S. So far this winter, her captain, Richard Cadigan, has delivered everything from food to building supplies to pickup trucks from Seattle to Anchorage on time - within a short 72-hour window.

She's the "Swiss Army Knife" of the US Navy. Recovery of downed aircraft, towing of sunken vessels, or clearing of debris to reopen a harbor in the wake of a natural disaster... USNS Grasp has done it all. Her cranes enable deep-sea salvage of all sorts. But what makes her special is her ability to support a team of up to 14 Navy divers on dangerous mixed-gas descents to depths of more than 200 metres. She's one of only four vessels in the entire US fleet capable of doing so.

Research Icebreaker Canadian Coast Guard Ship Amundsen is a research icebreaker who job is to battle Arctic extremes to understand how gobal warming will radically change life in the high Arctic; the crew and scientists face extreme pressure on this dangerous mission.

With 7.5 tons of steel salvaged from the wreckage of the Twin Towers forming her bow stem, USS New York is tribute to those who perished on September 11, 2001. From the images of the World Trade Center, to the banner listing the fallen, to the Broadway street sign donated by NYC's mayor, this ship is a powerful symbol. But she's more than that.

In a country whose economy is almost 100% based on fishing, Akamalik, the high-tech star of Royal Greenland's trawler fleet, plays a critical role.

The world's newest mega-cruiser has only 48 hours before she departs on her maiden voyage across the Atlantic, readying for her debut. She was constructed faster than any other cruise ship, but the job's not quite done.

Le Boreal is as sleek and nimble as a yacht, with the luxurious appointments and service of a cruise ship. She's also tough - custom-crafted to take on the furious weather and towering waves of the Southern Ocean

Powership Yasin Bey is built to sail anywhere and deliver badly-needed electricity. The ship’s first-ever voyage starts with Yasin Bey limping back to the shipyard - tilting to the side so much that it feels as if the ship will keel over.

Just off the coast of South Africa, a futuristic remote crawler creeps along the ocean floor. Its high tech nozzle is sucking up seabed gravel that's full of diamonds, and hoovering them up to the mother ship on the surface - MV Peace in Africa - the world's biggest underwater mining vessel.

With specialized cranes and underwater robots, Edda Freya repairs and replaces critical pipelines running to an oil and gas platform.

Purpose-built to install the world's most powerful wind turbines. Imagine a ship that can raise herself up 15 metres (5 storeys) out of the water to create a stable construction platform in the middle of the sea. Now add a 600-ton crane ready to reach high into the sky. That's Neptune: brand-new, ready and willing to install the world's heaviest and most powerful wind turbines on Belgium's first offshore wind farm.

Northern Leader is Alaska’s biggest and toughest longliner. Catching fish with hooks, not nets, she sends out 80 kilometres of fishing line containing 76,000 hooks. In the heart of the Bering Sea, her crew battles a hurricane with 13 metre-high waves and winds of more than 110 kilometres per hour. All the while, this 56-metre ship keeps fishing – bringing home a massive catch of Pacific Cod – until one deckhand working is washed out by a powerful wave.

MSC’s biggest cruise ship navigates tight Mediterranean harbors, offering a brand new water park, classic excursions and Cirque du Soleil at Sea

The world’s most innovative cruise ship sails from New York to the Caribbean on her maiden voyage, facing off against technical glitches and challenging weather.

This episode follows Happy Star during her second - challenging - voyage from Nansha, China, to Sept Isles, Canada and provides an insight into the ship and its crew.

The world’s most adventurous cruise ship fights through the ice-choked fjords of Greenland to visit a spectacular collection of wildlife and icebergs.

The FPSO Maersk Peregrino is the world's biggest oil production ship and is permanently hooked up at the Peregrino oil field.

She's an all-in-one mega fishing trawler and factory. Northern Eagle can catch and package fish at the same time. She creates more profit because she doesn't waste time (and fuel) bringing her catch back to shore to be processed. In fact, once she's out to sea, Northern Eagle doesn't return to port until her hold is full of 1500 tonnes of frozen, packaged product ready for market.

HDMS Peter Willemoes is a Royal Danish warship built for 21st century combat, equipped with sophisticated detection systems and powerful weapons. But before her crew can take her out to sea, they've got to prove they have what it takes to fight off enemy threats. Enter restricted waters and witness the series of intense battle simulation exercises her sailors must pass in order to join the multinational NATO Response Force. The stakes are high, but fortunately, they have one of the world's most advanced frigates on their side

A large storm hits the drilling rig out on the North Sea.

Tønsberg carries anything that can be rolled up her ramp: not just automobiles and bulldozers, but also heavy, awkward-sized cargo such as cranes, subway trains, or yachts. In some of the busiest ro-ro ports in Europe, Tønsberg’s crew rushes to overcome the obstacles that could delay her. Sailing across the Atlantic, two storms threaten to cross her path as the crew keeps a sharp eye on the lashings that hold the cargo in place.

One of the world’s most advanced drill ships builds an oil well more than 2000 metres below the waterline in the Gulf of Mexico.

One of the world’s largest container ships races from port to port in China, Malaysia and Germany, transporting almost 20,000 crates of cargo.