At this point, it has been proven that onboard LNG reliquefaction is uneconomical for most ships.

Reliquefaction and boil-off

3.1.2 Onboard - Reliquefaction Vessels 7

Hamworthy said that it had secured a contract to supply liquid natural gas reliquefaction systems on four dual fuel diesel electric-powered ships and a contract for ethylene reliquefaction systems for two liquefied ethylene gas carriers in Japan with a combined value of about £13 million.