A quick search resulted in this
http://rktman.com/rlh/wyeforce/gallery/realwyeforce/realwyeforce.html
WYEFORCE SPECIFICATIONS
Length: 63ft
Beam: 20ft
Draft: 8ft 6in
Top Speed: 11 knots
Endurance: 700 NM @ 10 knots
Engine: 2 ea. Caterpillar 3412 diesels (500kw ea.)
Bollard Pull: 19 tons
Builder: Hepworth Shipyard of Hull, England
Owner: itchen Marine Ltd, Southampton
http://www.barringtondieselclub.co.za/caterpillar/cat-3412.html
so it seems to be 2 V12 engines.