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To whom it may concern

Western Link project – Recommendation Letter

The present letter concerns the participation of the Assodivers Group of companies (ASDG) as subcontractors of Prysmian Powerlink SrL. in the project entitled ‘Western HVDC Link – Submarine Cable Installation at Wirral’. The said project was awarded to Prysmian Powerlink SrL. by the UK companies National Grid Electricity Transmission plc. and Scottish Power Transmission Ltd. and included the supply, installation and protection of 385km of submarine power cables in the Irish Sea between Scotland (Glasgow area) and England (Liverpool area).

In the course of this project, Prysmian Powerlink SrL. employed two members of ASDG, namely ‘Kreousa Shipping Company Ltd.’ and ‘Assodivers Technical-Commercial & Shipping Ltd.’ (ASD), for the provision of a range of cable installation and protection services that satisfied part of the scope of work of the project. ‘Kreousa Shipping Company Ltd.’ provided her specialist cable laying barge (CLB) ‘Atalanti’ and the anchor handling tug and supply (AHTS) vessel ‘Artemis’ whereas ‘Assodivers Ltd.’ provided full project engineering, management and execution services.

The scope of work of the ASDG member companies was performed between April and November 2014 according to the following schedule:

Transit of CLB Atalanti and AHTS Artemis from ASDG home port of Elefsina, Greece, to Prysmian’s cable manufacturing facility at Arco Felice, Naples, Italy, and loading 2x36.2km HVDC submarine power cables;

Transit of the vessels from Naples to Liverpool, UK, and loading of a basket containing 36.2km of fiber optic cable that would be laid in a bundle with the power cables;

Pre-Lay Grapnel Run (PLGR) operation along the cable route by AHTS Artemis and CLB Atalanti;

Pre-Lay Visual Survey along the cable route by ASD’s ‘Atom’ ROV, operated from CLB Atalanti;

Cable rollerway installation and beach preparation by ASD technical personnel at Wirral for subsequent cable pulling ashore under dry (low tide) conditions through HDD conduits pre-installed by another subcontractor;

Planned safe grounding / beaching of CLB Atalanti at Wirral and assistance in the pulling ashore of the three cables (two power and one fiber optic) under dry (low tide) conditions along the pre-installed rollerway up to the entrance of the HDD conduits;

Burial of the cables as a bundle to a target depth of 2m for approx. 620m at the very shallow water area (i.e. the area between the vessel’s beaching point and the entrance of the HDD conduits) using the CLB Atalanti’s jetting-assisted plowing vehicle ‘AssoPlow’ operated independently from the vessel with the support of a dedicated small barge;

Simultaneous Laying and Burial (SLB) operation of the cable bundle by CLB Atalanti working in tandem with the ‘AssoPlow’ to a target depth of 2m for approx. 21km and to a target depth of 3m for approx. 15km; after the end of SLB operations, the cables were capped and sealed and the final cable heads were safely deployed;

Post – Lay seabed survey along the cable route by the ‘Atom’ ROV operated from CLB Atalanti;

Remedial works in areas along the cable route that proved to be non-jettable, which included: o Post-Lay Burial (PLB) by jetting using ASD’s ‘Assojet II’ underwater vehicle operated from CLB Atalanti; o Concrete mattresses installation using suitable frame attached to one of the cranes of CLB Atalanti.

As Prysmian Powerlink SrL, we can hereby declare that the works of the Western HVDC Link project included in ASDG’s scope of work were performed safely, efficiently and to our satisfaction. The ASDG teams’ knowledge, experience, flexibility and good working spirit ensured a smooth cooperation with our onshore and onboard project teams and other subcontractors and contributed significantly to the success of the endeavor. Special mention must also be made to the resourcefulness displayed by ASDG offshore management when severe weather conditions were encountered during the SLB operation that ensured the safety of vessels and personnel and the integrity of the cables under very difficult circumstances.

Alberto Pirovano Offshore Project manager

Prysmian PowerLink S.r.l. Sede Legale Viale Sarca, 222 / 20126 Milano Tel +39 02 6449.1 www.prysmiangroup.com

Società con Socio unico - Direzione e coordinamento di Prysmian S.p.A Partita IVA 05931070964 Registro delle Imprese di Milano e Codice Fiscale 05931070964

R.E.A. di Milano 1859488 Capitale Sociale deliberato: € 100.000.000 i.v.

- 1 -1116.33.33

Prysmian PowerLink S.r.L Sede LegaleViale Sarca, 222 / 20126 MilanoTel +39 02 6449.1Direzione e coordinamento diPrysmian S.p.A

Partita IVA 05931070964Registro delle Imprese di Milanoe Codice Fiscale 05931070964R.E.A. di Milano 1859488

Capitale Sociale deliberato:€ 50.000.000 i.v.

Milan, 22/02/2013

TO WHOM IT MAY CONCERN

‘We herewith confirm that Kreousa Shipping with support from Assodivers has performed the

Repair works on SACOI Project in a timely and professional manner.

The above mentioned project involved:

Work area between Sardinia and Corsica, Italy, at approximately 70m water depth Work class ROV/Trencher, namely Venom 3K-600T used as:

o Cable uncovering tool in case of buried cableo Cable fault locator with dedicated equipmento Cable cutter in order to initiate repairo Cable grabber in order to recover cable/s onboard vessel

ROV for visual survey of all necessary M/V Astrea used as base of operation for the duration of the repair

Assodivers and their crew have fulfilled the above works to our entire satisfaction demonstratingtheir flexibility and good co-operation on field duty.

Your Faithfully

Prysmian PowerLink S.r.l.

Project Manager

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Prysmian PowerLink S.r.L Sede LegaleViale Sarca, 222 / 20126 MilanoTel +39 02 6449.1Direzione e coordinamento diPrysmian S.p.A

Partita IVA 05931070964Registro delle Imprese di Milanoe Codice Fiscale 05931070964R.E.A. di Milano 1859488

Capitale Sociale deliberato:€ 50.000.000 i.v.

To whom it may concern

Date: 27 Marzo 2012

Subject: Recommendation of Cometa Project (Romulo project).

We confirm that Assodivers Ltd has performed the works, as briefly described below, in

connection with the Contract for the implementation of an HVDC interconnection between the

Spanish mainland and the Baleares Islands, designated as the ‘’Cometa Project’ (part of Ròmulo

Interconnection project).

The HVDC link is designed for power transmission between the converter stations in Morverde,

close to Sagunto (Spanish peninsula) and in Santa Ponca in Mallorca Island (Baleares Islands).

The system is composed of a bi-polar connection scheme with a metallic return (MR) with the

inherent capability in the first stage of realization and during emergency conditions of mono-

polar operation using the metallic return. The bi-polar rating is 400MW at the rated voltage of

250kV.

Works performed:

Protection by trenching (PLB) of 37,026m of submarine cable length

Range of water depths: 13-124m;

Target DOC: 1.0m at Spanish mainland side, 0.5m at Mallorca side;

Post-burial survey of as-trenched cable lengths;

Trench cleaning (sweeping) by ejector;

Trenching at small pieces with the use of ejector only.

Installation of 392 Mattresses

Assodivers Ltd has fulfilled these commitments to our entire satisfaction and a special mention

shall be made to the flexibility demonstrated throughout the whole performance of the Works.

Giovanni CurtottiProject Manager

Prysmian PowerLink S.r.l.