https://www.intmaritimeengineering.org/index.php/ijme <p>The International Journal of Maritime Engineering (IJME) provides a forum for the reporting and discussion on technical and scientific issues associated with the design and construction of marine vessels. Contributions in the form of papers and notes, together with a discussion on published papers are welcomed.</p> <p>The IJME is published four times a year as the Transactions of The Royal Institution of Naval Architects and is available on subscription to members, and non-members.</p> <p>ISSN: 1479-8751</p> <p> </p> University of Buckingham Press en-US International Journal of Maritime Engineering 1479-8751 https://www.intmaritimeengineering.org/index.php/ijme/article/view/1317 <p>Wind-assisted ships and racing yachts employ highly cambered profiles to maximise performance. However, their complex aerodynamics governed by flow separation remains to be fully understood. Particle image velocimetry (PIV), performed in water tunnels, may lead to breakthroughs, provided fundamental spatial and temporal resolution limitations are overcome. Consequently, force measurements and flow visualisation were undertaken on circular arcs and yacht sails to ascertain the viability of this experimental approach. The results show that (i) a linear blockage correction can be devised; (ii) a blockage-independent critical Reynolds number and critical angle of attack exist; and (iii) a force crisis occurs because of the suppressed relaminarisation of the boundary layer downstream of the leading-edge separation bubble. Ultimately, PIV in water tunnels is shown to be a pertinent methodology. These findings provide novel insights into the aerodynamics of wind-assisted ships and yachts and may contribute to improving their performance by design.</p> Jean-Baptiste Souppez Copyright (c) 2025 International Journal of Maritime Engineering 2025-06-24 2025-06-24 167 A1 https://www.intmaritimeengineering.org/index.php/ijme/article/view/1313 <p>Remote operation offers multiple benefits as a viable transitional phase toward autonomous ships but also introduces situation awareness problems as identified from two feasibility studies: MUNIN and AAWA. However, it appears that situation awareness and its support systems are yet limited to visual and navigational awareness. This between-subjects study examined the effects of information organisation on situation awareness and fault detection performance of twenty-four marine engineers during engine room monitoring. The study identified better situation awareness and fault detection performance with cognitive support in information processing during challenging monitoring tasks. However, this effect appears to be mitigated during less demanding tasks. The overall fault detection rates across all trials remained at thirty-six per cent, albeit a single ship was monitored. With the prospect of a high workload at the future shore control centre, information organisation will be necessary to cultivate adequate situation awareness for engine room remote operators.</p> changhun han Rabiul Islam Apsara Abeysiriwardhane Shuhong Chai Copyright (c) 2025 International Journal of Maritime Engineering 2025-08-29 2025-08-29 167 A1 10.5750/ijme.v167iA1.1313