STL H1

STL H1 (IMO: 9763215) sailing under the flag. It has an overall length of 722 feets and a beam of 230 feets.

STL H1

Vessel Identification

• MMSI: 457680000
• IMO: 9763215
• Call Sign: JVZC8
• Vessel Type: Heavy Lift / Semi-Submersible
• Flag State: Mongolia

Specifications

• Gross Tonnage: 75,633 GT
• Deadweight: 99,115 DWT
• Length Overall: 227.6 m
• Beam: 42 m
• Year Built: 2017

Propulsion

• Propulsion Type: Diesel Electric
• Engine Configuration: Multiple diesel generators driving electric azimuth thrusters
• Dynamic Positioning: DP2 capable

Shipyard

• Builder: Samsung Heavy Industries
• Country: South Korea
• Delivery Year: 2017

Owner / Operator

• Owner: Saipem
• Operator: Saipem
• Country of Operation: International / Offshore Energy Sector

Navigation / Communications Equipment

• AIS Class: Class A
• AIS Transponder: Active
• GMDSS Equipped: Yes

Operating Region

• Primarily operates in offshore oil and gas regions including the Middle East, West Africa, Southeast Asia, and the North Sea, supporting subsea construction and heavy lift operations.

Vessel Description

STL H1 is a heavy lift and pipelay semi-submersible vessel operated by Saipem, designed for deepwater subsea construction activities. The vessel is capable of performing heavy lift crane operations, pipeline installation, and subsea infrastructure deployment. With DP2 dynamic positioning capability, it can maintain precise station-keeping in challenging offshore environments without anchoring. Its semi-submersible hull design provides enhanced stability in harsh sea states, making it suitable for operations in deepwater and ultra-deepwater environments across multiple offshore basins globally.