Mampaey Offshore Industries has developed and delivered the first iMSL Small Scale system for the world’s first LNG-powered trailing suction hopper dredgers (TSHD) Minerva and Scheldt River.
The transfer of the liquefied natural gas from ships required a linked ESD system to ensure a controlled shutdown of the transfer operation in the case of a detected emergency situation, according to Mampaey.
“The iMSL Small Scale has a primary link and a back-up link that are fail-safe and independent as reasonable practical with independent connection points. Emergency shut-down shall be fail-safe and transmitted by an Electric 5pin ‘Sigtto’ Link or Pneumatic Link. An independent back-up system shall be provided so that a common failure mode is reduced. The system is designed in full compliance with ISO28460, ISO20519 and SIGTTO Recommendations 2009,” said the company in its release.
Two special vessels, built by Royal IHC for DEME Group, were launched earlier this year.