All Coast christens 250 class liftboat

Written by Nick Blenkey
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SEPTEMBER 1, 2015 — Lafayette, LA, headquartered All Coast, LLC, the largest liftboat operator in the Gulf of Mexico, christened its new Class 250 liftboat, the Great White, on August 20 at C and M Marina in Lafitte, LA. The liftboat was designed and built SEMCO LLC’s Lafitte shipyard.

“SEMCO’s name is synonymous with quality construction of the safest, most reliable liftboats and we are proud to announce that the Great White is unparalleled to any other 250 class currently serving our market,” said John Nesser, All Coast Co-CEO and Manager.

Christening sponsor was Erin Allemand. The ceremony was attended by guests from the industry, media and local government, as well as company employees and management.

The Great White is a 250-foot leg liftboat with state-of-the-art design, comfortable accommodations, and modern features that include a combination conference room and movie theatre.The liftboat is equipped with two 175-ton leg mounted cranes and has a large open deck to assist in carrying equipment and supplies in support of various offshore activities.

The vessel can accommodate 50 people, accommodations include private rooms dedicated for customer representatives.

The Great White’s self-elevating and self-propelled liftboat design enables operations in a maximum working depth of 185 ft of water. It features nearly 9,000 sq. ft. of deck space for cargo storage with a maximum deckload capacity of 800,000 lbs. to accommodate heavier equipment loads.

All Coast’s newest vessel is one of the few 250+ class liftboats operating in the Gulf of Mexico market. All Coast is the only provider with a fleet of liftboats ranging in size from the 105 class to the 250 class.

“The Great White is emblematic of our investment in our customer’s experience and overall satisfaction,” said John Powers, Co-CEO and Manager of All Coast. “With this new addition, no other fleet in the Gulf can match our ability to cost effectively meet the specific needs of our customers by having vessels in nearly every class.”


  • Length 148.6′ Overall
  • Width 107′ Overall
  • Depth 13′
  • Legs 3, Length 250′
  • Deck Area 5,000 sq. ft.
  • Max. Deckload 800,000 lbs.
  • Accommodations 50
  • Max. Working Depth 185′ w/ 22′ air gap
  • Max. Working Height 227’Equipment
  • Crane-Port
  • RAM 200KLRP-120 LE
  • Type 120′ Leg Mount
  • Capacity 175 TonsCrane
  • RAM 200KLRP-120
  • Type 120′ Leg Mount
  • Capacity 175 TonsMain Engines
  • Type (2) Cummins QSK 38 Diesels
  • Generators, Cummins QSK 19 425 kW
  • Storage Capacity, Fuel 44,800 gals, Water 40,800 gals
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