Notice to Mariners Scottish Hydro Electric Power Distribution (SHEPD) – Notice to Mariners October 2018 Issued: 12th October 2018 Update 02 - Updated timeframe and cable order Please be advised that Global Marine (on behalf of SHEPD) will be undertaking inspection work related to submarine electricity cables as noted below: • Yell – Fetlar 2 • Whalsay – Outer Skerries • West Linga – Whalsay • Shetland – West Linga • Shetland – Whalsey • Papa Stour – Mainland Shetland • Clift Sound The purpose of the work is to confirm the exact location and condition of the cables. This will inform SHEPD’s schedule for replacing cables over the coming years. The inspection will utilise two different vessels: ▪ Global Symphony ▪ MPC Advance Updating the previous notice dated 10/10/18, the operations will now commence during an appropriate weather window from 22 October and will continue over a planned minimum period of 7-10 days, weather permitting. The cables shown above are in the planned sequence with 1-2 days being required per cable. These timescales are dependent on weather conditions and the granting of necessary licences from Marine Scotland. The operations will be concentrated across 1km cable corridors along the following cable locations shown on the following charts: Figure 1: Yell – Fetlar 2 - Location Overview Figure 2: Whalsay – Outer Skerries - Location Overview 0.0 0.4 0.8 1.2 1.6 km Figure 3: Shetland – West Linga & West Linga - Whalsay - Location Overview Figure 4: Shetland - Whalsay - Location Overview 0 1 2 3 km Figure 5: Papa Stour – Mainland Shetland - Location Overview 0.0 0.2 0.4 0.6 0.8 km Figure 6: Clift Sound - Location Overview Coordinates of the 1km cable corridor around each cable location are given in the table below. Each individual cable location will require this exclusion and gear clearance area for the inspection survey works (500m either side of the cable) for the duration of cable survey (approximately 1-2 days per cable). Co-ordinates for the survey works, Co-ordinates for the survey works, (WGS84) (the DDM are not negative (WGS84) (the DMS are not negative due due to these being westerlies i.e. to these being west of Greenwich meantime) westerlies i.e. west of Greenwich meantime) Indicative Latitude DDM N Cable length (km) Longitude Longitude DMS Latitude DMS DDM W W N 1° 16.298' W 60° 7.516' N 1° 16' 17.88" W 60° 7' 30.97" N 1° 16.623' W 60° 7.550' N 1° 16' 37.37" W 60° 7' 32.98" N Clift Sound 0.2 1° 16.387' W 60° 8.071' N 1° 16' 23.20" W 60° 8' 4.23" N 1° 16.101' W 60° 8.048' N 1° 16' 6.05" W 60° 8' 2.86" N 1° 16.298' W 60° 7.516' N 1° 16' 17.88" W 60° 7' 30.97" N 1° 40.648' W 60° 18.024' N 1° 40' 38.86" W 60° 18' 1.44" N 1° 41.267' W 60° 19.309' N 1° 41' 16.04" W 60° 19' 18.52" N Papa Stour 2.3 - 1° 40.235' W 60° 19.438' N 1° 40' 14.12" W 60° 19' 26.29" N Mainland 1° 39.606' W 60° 18.153' N 1° 39' 36.36" W 60° 18' 9.18" N Shetland 1° 40.648' W 60° 18.024' N 1° 40' 38.86" W 60° 18' 1.44" N 1° 6.888' W 60° 19.635' N 1° 6' 53.28" W 60° 19' 38.10" N 1° 3.959' W 60° 20.668' N 1° 3' 57.56" W 60° 20' 40.06" N 1° 2.896' W 60° 20.770' N 1° 2' 53.74" W 60° 20' 46.18" N 1° 2.098' W 60° 20.614' N 1° 2' 5.89" W 60° 20' 36.85" N Mainland 1° 1.877' W 60° 20.552' N 1° 1' 52.64" W 60° 20' 33.11" N Shetland 4.8 1° 2.261' W 60° 20.105' N 1° 2' 15.68" W 60° 20' 6.32" N - Whalsay 1° 3.311' W 60° 20.232' N 1° 3' 18.68" W 60° 20' 13.92" N 1° 5.996' W 60° 19.301' N 1° 5' 59.75" W 60° 19' 18.08" N 1° 6.348' W 60° 19.149' N 1° 6' 20.88" W 60° 19' 8.94" N 1° 6.888' W 60° 19.635' N 1° 6' 53.28" W 60° 19' 38.10" N 1° 2.674' W 60° 21.268' N 1° 2' 40.46" W 60° 21' 16.06" N 1° 4.821' W 60° 21.454' N 1° 4' 49.26" W 60° 21' 27.25" N Mainland 2 Shetland - 1° 4.635' W 60° 21.983' N 1° 4' 38.09" W 60° 21' 58.99" N West Linga 1° 2.487' W 60° 21.798' N 1° 2' 29.22" W 60° 21' 47.90" N 1° 2.674' W 60° 21.268' N 1° 2' 40.46" W 60° 21' 16.06" N 1° 0.424' W 60° 21.477' N 1° 0' 25.46" W 60° 21' 28.63" N 1° 1.945' W 60° 21.262' N 1° 1' 56.69" W 60° 21' 15.71" N West Linga 1.4 - Whalsay 1° 2.296' W 60° 21.769' N 1° 2' 17.74" W 60° 21' 46.14" N 1° 0.727' W 60° 22.004' N 1° 0' 43.63" W 60° 22' 0.26" N 1° 0.424' W 60° 21.477' N 1° 0' 25.46" W 60° 21' 28.63" N 0° 46.996' W 60° 25.508' N 0° 46' 59.77" W 60° 25' 30.47" N 0° 46.921' W 60° 24.964' N 0° 46' 55.24" W 60° 24' 57.82" N 0° 47.606' W 60° 24.936' N 0° 47' 36.35" W 60° 24' 56.16" N 0° 49.275' W 60° 24.553' N 0° 49' 16.50" W 60° 24' 33.19" N 0° 51.644' W 60° 23.774' N 0° 51' 38.63" W 60° 23' 46.46" N 0° 53.044' W 60° 22.988' N 0° 53' 2.62" W 60° 22' 59.30" N 0° 54.052' W 60° 22.901' N 0° 54' 3.10" W 60° 22' 54.08" N 8.5 0° 54.441' W 60° 22.758' N 0° 54' 26.46" W 60° 22' 45.48" N Whalsay - Out Skerries 0° 55.100' W 60° 23.244' N 0° 55' 6.02" W 60° 23' 14.64" N 0° 54.633' W 60° 23.402' N 0° 54' 37.98" W 60° 23' 24.14" N 0° 53.677' W 60° 23.477' N 0° 53' 40.63" W 60° 23' 28.64" N 0° 52.600' W 60° 24.098' N 0° 52' 35.98" W 60° 24' 5.87" N 0° 50.096' W 60° 24.956' N 0° 50' 5.75" W 60° 24' 57.35" N 0° 48.389' W 60° 25.385' N 0° 48' 23.33" W 60° 25' 23.12" N 0° 46.996' W 60° 25.508' N 0° 46' 59.77" W 60° 25' 30.47" N 0° 59.102' W 60° 38.431' N 0° 59' 6.14" W 60° 38' 25.87" N 0° 58.244' W 60° 38.231' N 0° 58' 14.66" W 60° 38' 13.88" N 0° 56.805' W 60° 38.052' N 0° 56' 48.30" W 60° 38' 3.12" N 0° 55.917' W 60° 37.694' N 0° 55' 55.02" W 60° 37' 41.66" N 0° 56.633' W 60° 37.283' N 0° 56' 38.00" W 60° 37' 16.97" N Yell - Fetlar 3.2 0° 57.356' W 60° 37.559' N 0° 57' 21.38" W 60° 37' 33.56" N 0° 58.875' W 60° 37.745' N 0° 58' 52.50" W 60° 37' 44.69" N 0° 59.759' W 60° 38.003' N 0° 59' 45.56" W 60° 38' 0.20" N 0° 59.102' W 60° 38.431' N 0° 59' 6.14" W 60° 38' 25.87" N The survey operations will be undertaken by the vessels pictured below. The vessels may not commence their activities at the same time but may operate simultaneously at times over the duration. Vessel/Equipment Photo Vessel/Equipment Description Advance Length: 15 m, Beam: 5.8 m, Draft: 0.75 m Call Sign: 2CYG9 MMSI: 235076772 Vessel/Equipment Photo Vessel/Equipment Description Seaeye Falcon Observation ROV Dimensions: 1.0m x 0.5m x 0.6m Depth rating: 300m Figure 7 – Details of MPC Advance Global Symphony LOA: 130.2 m, Breadth: 24 m, Max Draft: 7.5 m Call Sign: C6YY3 MMSI No: 311049100 FCV3000 Work class ROV Dimensions: 3.3m x 1.7m x 1.7m Depth rating: 3,000m Figure 8 – Details of Global Symphony Works Description The inspections will involve the use of a Remotely Operated Vehicle (ROV) equipped with a full suite of geophysical survey systems (Multi beam Echo Sounder and Side Scan Sonar). The ROV will be operating close to the seabed, at a distance from the vessel (potentially 20m from the MPC Advance and potentially 100m from the Symphony). The ROV will be towed behind the vessel and will operate within 1-3m of the seabed, and cable. The ROV will work along the route of the cable. In the water between the ROV and the vessel there will be the umbilical of the ROV – the exclusion zone mentioned below is to ensure passing vessels do not pass between the ROV and the vessel which would risk snagging the equipment, particularly the umbilical.