Robert Allan Ltd. reports that a pair of of dual fuel (diesel and LNG) standby vessels built to its RAstar 4200-DF design recently entered service with Hongkong Salvage & Towage (HKST). Built by Cheoy Lee Shipyards, the vessels, the LNG Sentinel I and LNG Sentinel II, were specifically designed for service at the Hong Kong LNG Terminal Limited (HKLTL) import terminal.
The standby vessels feature an electrical propulsion system with Z-drives that can receive power from both diesel and dual fuel...
https://www.marinelog.com/inland-coastal/coastal/dual-fuel-standby-duo-goes-to-work-in-hong-kong/