(Translated from original letter)

ENERGYWORKS CARBALLO        E15100  CARBALLO - La Coruña – (Spain)

16 June 2015

Dear Sirs,

Hereby, we certify that in 2002 we successfully finished the test carried on in collaboration with the Deutz BV 16M640 engine manufacturer, the additive manufacturer BERTOMEU and EWCR, owner of the Deutz BV 16M640 engine with serial number 010081 in order to try to extend the TBO of the exhaust valves, setting our goal to move from 3,000 to 6,000 hours.

Since then, we have used regularly and continuously the additive Beco F1/ASF, getting in these 13 years some very beneficial results, especially in exhaust valves in turbos.

In the case of exhaust valves we could extend the operation life up to 30,000 hours, more than doubling the estimated life suggested by the manufacturer.

Our engines have currently reached 74,000 hours of operation, having been replaced 2 sets of exhaust valves and being installed the third one with about 12,000 working hours.

The last TBO, because of installation needs, was made after 7,200 working hours, having worked on about 10% of them before reaching this point.

We currently use the additive Beco F1/ASF at a rate of 0.5 L per tonne of fuel oil.

We authorise the exhibition of this letter as a reference for any purpose.

Yours faithfully,

Signed : Tomás López Curros
             Head Marine Engineer
             Power plant Manager