Mighty Ships Season 4

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.