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Fall of Warness Berth 6 Orbital O2 Device Navigation Risk Assessment

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Fall of Warness Berth 6 Orbital O2 Device Navigation Risk Assessment ORBITAL MARINE POWER (LIMITED) FALL OF WARNESS BERTH 6 ORBITAL O2 DEVICE NAVIGATION RISK ASSESSMENT Report Reference: 20UK1675_OMP_RN_FOW_NRA Issue: 01 Date: 12 February 2021 MARINE AND RISK CONSULTANTS LTD Report No: 20UK1675 Commercial-in-Confidence Issue No: Issue 01 FOW Berth 6 Orbital O2 NRA ORBITAL MARINE POWER (LIMITED) FALL OF WARNESS BERTH 6 ORBITAL O2 DEVICE NAVIGATION RISK ASSESSMENT Prepared for: Orbital Marine Power (Limited) Innovation Centre – Orkney, Hatston Pier Road Kirkwall, Orkney. Scotland, KW15 1ZL Author(s): William Heaps Checked By: Rebecca Worbey Date Release Prepared Authorised Notes 04 Feb 2021 Draft A WH AC For client comment 12 Feb 2021 Issue 01 RW AC Final Issue. Updated following comments. Marine and Risk Consultants Ltd Marico Marine Bramshaw Lyndhurst Hampshire SO43 7JB United Kingdom Tel. + 44 (0) 2380 811133 12 February 2021 Orbital Marine Power (Limited) i Report No: 20UK1675 Commercial-in-Confidence Issue No: Issue 01 FOW Berth 6 Orbital O2 NRA EXECUTIVE SUMMARY This Navigation Risk Assessment was commissioned by Orbital Marine Power (Limited) to assess the impact to navigational safety of the installation of the next generation Orbital O2 device, at the EMEC Berth 6 Fall of Warness test site, Eday, Orkney. This study is required to obtain a new marine licence from Marine Scotland under Section 20(1) of the Marine (Scotland) Act 2010 and considers two phases of the project: 1. Tow to and from Berth 6 of EMEC’s Fall of Warness test site; and 2. Mooring at Berth 6 of EMEC’s Fall of Warness test site (includes installation, operation, and decommissioning). The study seeks to identify the level of risk to navigating vessels of all types resulting from the device while on transit to and from and moored at Berth 6 (in combination with other existing nearby devices), and where necessary, identify risk controls that should be implemented to ensure the risk remains at or less than As Low as Reasonably Practicable. All hazards were scored as low risk. The highest scoring hazards were associated with project vessels (maintenance and towing), due to the proximity of the vessels to the device. The risk however, was scored as low, due to the experience and awareness of the project vessel team. Consultation confirmed that the majority of local marine users are used to navigating around the existing berths /devices within the area and as such, were not concerned with the presence of the new device. A review of the impacts of the devices shows little impact on collision and contact risk, search and rescue or communications, radar and position systems. Two additional risk control measures have been identified, the implementation of which is recommended. In summary, the increase in risk to navigating vessels as a result of the installation, operation (including maintenance) and decommissioning of the Orbital O2 device at berth 6 is Low. Orbital Marine Power (Limited) ii Report No: 20UK1675 Commercial-in-Confidence Issue No: Issue 01 FOW Berth 6 Orbital O2 NRA CONTENTS Executive Summary ................................................................................................................................. ii Contents ........................................................................................................................................... iii Abbreviations .........................................................................................................................................vii 1 Introduction .................................................................................................................................. 1 1.1 Study Area .......................................................................................................................... 1 1.2 Scope and Methodology..................................................................................................... 3 1.3 Guidance ............................................................................................................................. 4 1.3.1 MGN 543 Compliance Table .................................................................................... 5 2 Berth 6 Orbital O2 Project ............................................................................................................ 6 2.1 The Project ......................................................................................................................... 6 2.2 The Device .......................................................................................................................... 6 2.2.1 Moorings .................................................................................................................. 8 2.2.2 Anchors .................................................................................................................. 10 2.2.3 Scour Protection ..................................................................................................... 11 2.2.4 Marking and Lighting.............................................................................................. 11 2.3 Construction, Operation and Decommissioning .............................................................. 12 2.4 Tow to / From Berth 6 ...................................................................................................... 12 2.5 Installation ........................................................................................................................ 13 2.6 Operation and Maintenance ............................................................................................ 14 2.7 Decommissioning ............................................................................................................. 14 3 Overview of the Baseline Environment ...................................................................................... 15 3.1 MetOcean Conditions ....................................................................................................... 15 3.1.1 Wind ....................................................................................................................... 15 3.1.2 Wave ...................................................................................................................... 15 3.1.3 Tide ......................................................................................................................... 16 3.1.4 Visibility .................................................................................................................. 18 3.2 Existing Vessel Traffic Management ................................................................................. 18 3.3 Search and Rescue ............................................................................................................ 18 3.4 Other Offshore Activities .................................................................................................. 18 3.4.1 Aquaculture ............................................................................................................ 18 3.4.2 Renewables ............................................................................................................ 19 3.4.3 Subsea Cables ......................................................................................................... 19 3.4.4 Anchorages ............................................................................................................. 19 Orbital Marine Power (Limited) iii Report No: 20UK1675 Commercial-in-Confidence Issue No: Issue 01 FOW Berth 6 Orbital O2 NRA 3.4.5 Military Exercise Areas ........................................................................................... 19 3.4.6 Spoil Grounds ......................................................................................................... 19 4 Consultation ................................................................................................................................ 20 5 Existing Vessel Traffic and Risk Profile ........................................................................................ 22 5.1 Data Sources ..................................................................................................................... 22 5.1.1 Data currency ......................................................................................................... 22 5.1.2 Requirement for Radar Survey ............................................................................... 22 5.2 Vessel Traffic Analysis....................................................................................................... 24 5.3 Proximity Analysis............................................................................................................. 28 5.4 Historical Incidents ........................................................................................................... 31 6 Future Traffic Profile ................................................................................................................... 33 6.1 Orkney Commercial Traffic ............................................................................................... 33 6.2 Fishing and Recreational Traffic ....................................................................................... 33 6.3 Renewable Energy Related Traffic ................................................................................... 34 6.4 Summary........................................................................................................................... 34 7 Impacts to Navigation
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