[thackney]

According to:
http://hhpinsight.com/marine/2013/06/incats-lng-ferry-worlds-fastest-ship/
the engines are LM2500s.

They power more than 400 ships in 30 world navies, fast ferries, coast guard cutters, supply ships and cruise ships.

http://www.geaviation.com/engines/marine/lm2500.html

Output 33,600 shp (25,060 kW)
Heat rate 6,860 Btu/shp-hr
Exhaust gas flow 155 lb/sec (70.5 kg/sec)
Exhaust gas temperature 1,051°F (566°C)
Weight (lb): 10,300
Length (m): 6.52
Height (m): 2.04

[cicero2k]

Sounds like the GE Frame 5 GT. That exhaust temperature would power a steam cycle in a land based plant.