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

Multipurpose Heavy Lifter MV Beluga Bremen is the world's first multi-purpose, heavy-lift cargo carrier that can hoist more than 1,400 tons; travel with her on her maiden voyage to transport two 820-tonne mining autoclaves to the Dominican Republic.

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.

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.

Super Ferry Stena Britannica is a car carrier, passenger ferry, cargo transport and cruise ship all rolled into one; watch her as she enters active service on the busiest ferry route in the world, between Holland and England.

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.

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.

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

She's brand-new and about to make history. The Dutch company Van Oord has just received its new fallpipe vessel called Stornes. She deploys a long hollow pipe that runs from the ship to the seafloor. Rocks are loaded into the pipe and "fall" down to the bottom, hence the term "fallpipe". The rocks are used to provide foundations and protection for pipelines that are then laid on the ocean floor. Stornes has been designed and built specifically for this purpose. Now, MIGHTY SHIPS follows Stornes on a project that has her working deeper than any other fallpipe vessel in history.

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.

Consistently voted the world's top cruise ship by Condé Nast, Crystal Serenity is full of luxuries. She features contemporary suites, dining by the likes of Nobu, even penthouse suites with a full-service butler. And her guests keep coming back for more - half the passengers on any given sailing are repeat bookings. This cruise will take MIGHTY SHIPS into ports viewers have never seen before, including: the famous sites of Sydney harbour, the port of Melbourne, beautiful Bali and a large-scale furniture load in Semarang, Indonesia.

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.

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.

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.

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.

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.

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.

The Avataq is a lifeline to Canada's near-Arctic communities, carrying everything from food and furniture to mining equipment and explosives to Quebec's inaccessible northern regions.

Ibn Battuta is one of the strongest dredgers of her type. With a powerful spinning cutter head and a pair of heavy-duty cylinders called "spuds," She is capable of breaking up the hardest sub-sea soil. The spuds brace the ship in position while the cutter head's teeth grind away at the sea floor to deepen the Son Duong Port in Vietnam's poorest province.

Other cable laying vessels require a second vessel to transport one end of their cables to shore. Stemat Spirit approaches the shore during high tide, then settles on the sand as the tide recedes. When the tide returns she floats up and sails out to sea, laying her cable as she goes.

Over seven seasons, Mighty Ships has featured 42 of the biggest, most technologically advanced on the planet. This special edition will feature the best of the best: from the world's largest cruise ships to the most powerful warships, from the strongest working ships to smaller, super-specialized vessels.

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.

To transport one of the world's largest oil rigs around the world, Hawk has to sink before she swims. To load, she sinks down in the water, submerging her expansive deck.

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.

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.