An AqualisBraemar LOC Company Group Overview About Us Sectors Services Our People Our Offices Case Studies News Careers Contact Us Home / Marine Operations Engineering / Site Specific Assessment (SSA) Site Specific Assessment (SSA) Longitude provides engineering services relating to the location approval for jack up units. Our expertise in this field is a result of the significant experience of our marine and engineering staff with respect to the operational safety of these vessels. Contact our experts SPECIALISTS IN SITE SPECIFIC ASSESSMENT Longitude has developed an extensive in-house database of jack up units and together with our services relating to soil characterisation and evaluation, we are able to undertake site specific leg penetration and extraction studies. Where required a full site-specific assessment can be undertaken taking into account both geotechnical and structural considerations. Longitude Engineering undertakes our assessment to recognised codes, which include SNAME 5-5A and or ISO 19905-1. SITE ASSESSMENT ENGINEERING In order to assess the suitability of a site for jack up vessels, our engineers can provide the following assessments as part of a location approval by MWS: Leg Penetration Analysis (LPA) Site Specific Assessment based on ISO or SNAME Requirements Punch Through Survival and Recovery Dry Transportation Design and Verification Scour and Leg Extraction Site Spot Metocean Report Site Zoning and Preload optimisation Leg Seabed Impact Analysis Operability Analysis For floating units such as drillships and semi submersibles, we provide anchor patterns, mooring analysis, line profiles and riser analysis. MITIGATION MEASURES Our experience enables us to recommend mitigation measures where the safety of jacking operations has been identified as a risk, these may be as follows: Alternate Location Reduction in Pre-Load Operate in Weather Restricted Mode with ‘Cut and Run’ Approach Jetting Ground Improvement e.g. stomping or rock dump placement Spud-can modifications KEY CONTACTS David Bignold Oil & Gas Market Lead, Longitude London, Longitude View Profile Nicolas Cazeres Managing Director, Longitude USA Boston View Profile Catherine Bradley Lead Geotechnical Engineer Newcastle, Longitude View Profile CASE STUDIES VIEW ALL RIVER PLASTIC COLLECTION VESSEL – CONCEPT DESIGN Longitude developed the concept design of a river plastic collection vessel, collecting plastic polluting with minimum impact to the river’s biodiversity. Longitude’s Scope of Work  Design Basis of… WOEN JINN CABLE LAY SHIP NEWBUILD CONCEPT DESIGN Woen Jinn are the installers of submarine power cables in Taiwan. They were awarded a project in Taiwan to install power cables for offshore wind farms and chose to… LS CABLES & SYSTEMS – SOUTH EAST ASIA CABLE INTERCONNECTOR Longitude were instructed by LS Cables & Systems (LSCS) to support them for the installation analysis and procedures for 2 HVAC power cables systems in South East Asia. Longitude worked… Terms & Conditions Privacy Policy Copyright © 2021 Longitude. All Rights Reserved. AqualisBraemar LOC Group Companies FOLLOW LOC × Cookies This website uses necessary cookies to ensure you get the best experience on our website. OK, I'm fine with this Change Settings × Cookie Settings Essential cookies are required for you to use this website. Without these cookies services you have asked for cannot be provided. Essential cookies Non-essential cookies are used to collect information for making reports that help us improve the site. The cookies collect information in an anonymous form. Non-essential cookies See our Privacy Policy for more details