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.

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.

Solitaire is the only ship in the world capable of laying huge 30 inch diameter pipes on the ocean floor. Her crew of 420 work 24/7 and can lay down 9km of pipeline a day. Led by a vessel management team, the crew is made up of mariners and welders from all over the world.

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.

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

Africa Mercy is the world's largest NGO hospital ship. She travels port to port in the world's poorest regions providing medical care to people who may have never met a doctor or visited a hospital. 150m long and equipped with six state-of-the-art operating theatres, Africa Mercy can deliver medical care as good as any big city hospital in North America.

An unprecedented look at nuclear-powered submarine USS Kentucky.

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.

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.

The largest and most revolutionary cruise ship on Earth makes her maiden voyage.

G.O. SARS is a new generation of marine research vessel. Her vibration-and noise-damped diesel generators and propellers driven by direct current motors, emits 99% less noise than any other conventional ship. They offer scientists unprecedented access to the life in the world's oceans.

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.

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.

Almost three football fields long, the USNS Comfort is second in size only to U.S. Navy aircraft carriers. She is the largest hospital ship on the planet, with up to 1,200 crew, 12 operating rooms, 1,000 beds, and an impressive array of medical equipment. MIGHTY SHIPS joins the USNS Comfort midway through “Operation Continuing Promise” – a six-month mission to provide humanitarian aid to 11 countries in the Caribbean and Latin America. Sailing to the tiny Caribbean island of Dominica, Comfort’s crew sets out to aid 10,000 patients in just nine days.

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.

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.

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

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.

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.

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

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.

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.

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

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

With a specialized crane system and five propellers to counter heavy seas, North Sea Giant can perform powerful and precise lifts in seas as high as 4.5 metres – four times the capability of other such vessels. On this voyage, she’s out to lift and install the final massive module of the world’s first subsea gas compression station nearly 300 metres underwater. But when strong winds and currents threaten the delicate operation, her team of underwater robots must come to the rescue before the module crashes the entire project!