56b756be-ea8a-1448-e054-002128a47908 English dataset British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK enquiries@bgs.ac.uk pointOfContact 2026-04-17 MEDIN Discovery Metadata Standard Version 2.3.5 www.epsg.org 2005 revision urn:ogc:def:crs:EPSG::4326 OGP Scottish Natural Heritage (SNH) Multibeam and Geophysical Survey of Arran for SNH 2015/9_SNH: South and East coast of Arran (25/Nov/2015 to 17/Apr/2016) 2016-04-17 publication BGS_CMD_REF992 British Geological Survey This marine multibeam and sidescan survey (2015_9_SNH) took place in three phases (25/11/2015 to 03/12/2015, 17-28/02/2016 and 04-17/04/2016) in the area off South and East coast of Arran on board the RV White Ribbon. The survey was carried out by the British Geological Survey (BGS) on behalf of Scottish Natural Heritage/MarineScotland. The aim of the survey was ensonification of 10 areas designated by SNH. Sea floor bathymetry data were collected using a Kongsberg EM3002D multibeam system and dual frequency Sidescan Sonar (100khz, 455khz). These data are archived by BGS. Technical details of the survey are contained in the BGS Report of Survey. British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK enquiries@bgs.ac.uk custodian Scottish Natural Heritage offshoredata@bgs.ac.uk originator notPlanned NDGO0001 Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication soil and sediment crust SeaVoX Vertical Co-ordinate Coverages (L131) 2010-05-18 revision otherRestrictions otherRestrictions otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced Scottish Natural Heritage materials "Contains Scottish Natural Heritage materials ©Scottish Natural Heritage [year]" grid 5 English geoscientificInformation BGS Gazetteer 2026-04-17 revision Clyde BGS Gazetteer 2026-04-17 revision Argyll Charting Progress 2: Regional Sea Boundaries 2009-06-18 creation Irish Sea The SeaVoX Salt and Fresh Water Body Gazetteer: Sub-Ocean Category 1954-01-01 creation INNER SEAS OFF THE WEST COAST OF SCOTLAND -5.4055 -5.0214 55.3854 56.0229 2015-11-25 2016-04-17 British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK enquiries@bgs.ac.uk distributor http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2015/9_SNH WWW:LINK-1.0-http--link BGS Offshore Geoindex GeoIndex allows users to search for information about BGS data collections covering the UK and other areas world wide. Access is free, the interface is easy to use, and it has been developed to enable users to check coverage of different types of data and find out some background information about the data. More detailed information can be obtained by further enquiry through the website. search dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of unknown theme 2011 publication See the referenced specification false British Geological Survey was contracted to undertake the survey on behalf of Scottish Natural Heritage. NAVIGATION: A Trimble SPS461 with precise DGPS corrections provided via a Fugro MarineStar license, which provides approximately 0.10m accuracy in horizontal and 0.15m in the vertical. A Kongsberg Seatex Seapath 200 combines GPS and an MRU to provide vessel heading and motion data plus a secondary position feed. Soundings were reduced to Chart Datum in CARIS Hips and Sips v9.1. All control is referred to the European Terrestrial Reference System 1989 using the GRS80 Ellipsoid. Grid and orthometric heights are given in terms of WGS 84 UTM Zone 30 and Chart Datum. MULTIBEAM: EM3002D is a dual-headed multibeam system capable of producing up to 508 dynamically focused beams; this produces a swath width of up to 200° operable in depths of up to 200 m. The system operates in the 300 kHz frequency range, which ensures narrow beams and a small acoustic footprint, and is also robust under conditions with high particle content in the water column. Kongsberg acquisition software, Seafloor Information System (SIS). All multibeam data was processed in CARIS HIPS and SIPS. Tidal reduction was performed predominantly using RTK height, however when this dropped out for boxes T1Plus and D5 the tide gauge at Millport was used. IHO Order 1a. BACKSCATTER data: ARCGRID; TIF images; XYZ. Fledermaus (.sd) available on request. SIDE SCAN SONAR: Equipment trials - Data not available. TIDE: The VORF model was used for the majority of this project; Areas D6 and T4 experienced RTK drop out, as such VORF could not be used here. In these areas data from the Millport tide gauge was used for tidal reductions. For more detailed information on the acquisition equipment and data collection techniques, operational standards, data processing methods and quality control procedures used on this survey see the Report of Survey.