Feasibility of Seakeeping, Cost and GHG Efficiency of <24m SWATH design for ROV deployment

海上关键的国家基础设施，如海底电缆和风电场，需要增加资产完整性检查，以确保安全运营，并通过预防性维护减少停机时间。海上风电场每年的海底检查成本估计为每1GW 1800万英镑/年（预计到2030年英国将达到9亿英镑@50GW;皇冠地产）。鉴于到2028年，69 GW运营船队中的20%将超过10年，OSW的检查和服务预计将迅速增长。水下检查需要从海上平台上发射和回收遥控潜水器（ROV），海上平台受海况变化的影响。目前的船舶设计效率低下，例如，为了增加操作检查时间，公司部署了更大的船舶，在大海况下提供更稳定的平台，但消耗10- 50立方米/天的柴油（39.6- 132吨二氧化碳/天）。运营商正在研究更小的无人驾驶解决方案。然而，这些较小的平台仅限于在海况<3-4最大力，有效波高<1.5米的情况下运行。在英国，这将限制5月至8月的运营，运营时间<50%（约61天）。如果我们要增加海上风力，同时降低能源的平准化成本，这在商业上是不可行的。ACUA海洋（AO）通过清洁海事示范竞赛1（CMDC 1）设计了一艘小型水线面双船体（SWATH）氢动力船，重点是海洋监测和保护。小水线面双体船具有固有的增加的稳定性，根据经验，小水线面双体船提供的耐波性能相当于单体船的总吨位的15倍。因此，AOs 21 t小水线面双体船具有300 t单体船的理论耐波性能，使其成为效率更高的整船设计。在这项可行性研究期间，AO和SMMI的目标是对船舶耐波能力进行波浪水槽测试，以模拟船舶有效载荷部署和回收操作限制。波浪水槽测试的成功演示和模拟将展示AO船舶的能力，并将使AO和最终客户能够加速小型SWATH商业部署系统的开发，并将AO能力扩展到新的应用和用例，在快速增长的ORE和海上基础设施市场中开辟新的商业和地理机会。

Offshore critical national infrastructure, such as subsea cables and wind farms, requires increasing asset integrity inspections to ensure safe operations, and decrease downtime through preventative maintenance. Annual Offshore Windfarm subsea inspections costs are estimated at £18m/yr per 1GW (£900m @50GW anticipated by 2030 in UK; Crown Estate). Given that by 2028 20% of the 69GW operational fleet will be more than 10 years old, inspection and services of OSW is expected to grow rapidly. Subsea inspections require launch and recovery of Remote Operated Vehicles (ROV) from an offshore platform which is subject to variable seastate conditions. Current vessel designs are inefficient E.g. to increase operational inspection time, companies deploy larger vessels which offer a more stable platform in large sea states, but consume 10-50m3/day of diesel (39.6-132tCO2/day). Operators are investigating smaller uncrewed solutions. However these smaller platforms are restricted to operating in seastates <3-4 force max, with significant wave height <1.5m. In the UK this would limit operations from May-Aug, with operational time <50% (~61days). This is unviable commercially if we are to increase offshore wind whilst reducing the levelized cost of energy. ACUA Ocean (AO) through Clean Maritime Demonstration Competition 1 (CMDC1) designed a small waterplane area twin hull (SWATH) hydrogen powered vessel with a focus on marine monitoring and protection. SWATH vessels have an intrinsic increased stability, as a rule of thumb SWATH vessels offer a seakeeping performance equivalent to monohull vessels 15x the gross tonnage. Therefore, AOs 21t SWATH vessel has a theoretical seakeeping performance of a 300t monohull vessel making it a significantly more efficient whole-ship design. During this feasibility study, AO and SMMI aim to conduct a wave tank test of the vessels seakeeping capabilities to simulate ROV payload deployment and recovery operational limits. A successful demonstration and simulation of a wave tank testing would demonstrate the capability of AOs vessels and would enable AO and end customers to accelerate the development of a commercial ROV deployment system from small SWATH and expand the AOs capabilities to new applications and use cases, opening up new commercial and geographical opportunities within a rapidly growing ORE and offshore infrastructure markets.