Margareta Lützhöft

ON YOUR WATCH: AUTOMATION ON THE BRIDGE.

Several recent maritime accidents suggest that modern technology sometimes can make it difficult for mariners to navigate safely. A review of the literature also indicates that the technological remedies designed to prevent maritime accidents at times can be ineffective or counterproductive. To understand why, problem-oriented ethnography was used to collect and analyse data on how mariners understand their work and their tools. Over 4 years, 15 ships were visited; the ship types studied were small and large archipelago passenger ships and cargo ships. Mariners and others who work in the maritime industry were interviewed. What I found onboard were numerous examples of what I now call integration work. Integration is about co-ordination, co-operation and compromise. When humans and technology have to work together, the human (mostly) has to co-ordinate resources, co-operate with devices and compromise between means and ends. What mariners have to integrate to get work done include representations of data and information; rules, regulations and practice; human and machine work; and learning and practice. Mariners largely have to perform integration work themselves because machines cannot communicate in ways mariners see as useful. What developers and manufacturers choose to integrate into screens or systems is not always what the mariners would choose. There are other kinds of ‘mistakes’ mariners have to adapt to. Basically, they arise from conflicts between global rationality (rules, regulations and legislation) and local rationality (what gets defined as good seamanship at a particular time and place). When technology is used to replace human work this is not necessarily a straightforward or successful process. What it often means is that mariners have to work, sometimes very hard, to ‘construct’ a cooperational human-machine system. Even when technology works ‘as intended’ work of this kind is still required. Even in most ostensibly integrated systems, human operators still must perform integration work. In short, technology alone cannot solve the problems that technology created. Further, trying to fix ‘human error’ by incremental ‘improvements’ in technology or procedure tends to be largely ineffective due to the adaptive compensation by users. A systems view is necessary to make changes to a workplace. Finally, this research illustrates the value problem-oriented ethnography can have when it comes to collecting information on what users ‘mean’ and ‘really do’ and what designers ‘need’ to make technology easier and safer to use.

Fatigue at sea in Swedish shipping—a field study†

BACKGROUND Today many merchant ships sail with only two nautical officers, working a shift schedule of 6 hr on and 6 hr off. There are concerns that such a shift schedule is related to fatigue. However, little data exist from onboard studies of seafarers. METHODS Data were collected on board 13 ships. Fifteen participants worked on a 6-on, 6-off watch system and another 15 on a 4-on, 8-off watch system. Electrooculography, actigraphy, diaries, and reaction time tests were used to measure the effects of shift system on fatigue and sleep. RESULTS AND CONCLUSIONS Sleepiness was higher during the night shift in the 6-on, 6-off system. Moreover, sleepiness increased more during the watch in the 6-on, 6-off system compared to the 4-on, 8-off system. There was a trend toward shorter sleep episodes in the 6-on, 6-off system and sleep was more often split into two episodes.

Information Environment, Fatigue, and Culture in the Maritime Domain

Maritime shipping operates within a complex operational setting and incorporates many types of workplaces and work roles. The maritime domain has been a bit slower than other complex domains in its research and development of human factors and ergonomics application. The problem remains that the operator is continuously being excluded from the loop, which increases the probability of shipboard errors and accidents. This chapter begins by providing a general introduction to the maritime domain and its unique characteristics and is followed by a section on the information environment on the bridge. The section on the information environment on the bridge highlights the importance of integrating the end user into the bridge system and how technology must provide intuitive information at the right level of complexity at the right time. The main focus of this chapter is then split into two areas of current high significance: fatigue on board and maritime culture (also incorporating safety culture issues). Fatigue on board is of major concern, and most studies indicate that a systems approach must be adopted. This approach should account for aspects such as the number of personnel, trip length, frequency and duration of port visits, and shift planning. Within the area of maritime culture, multiculturalism and the way it is managed on board ships, including shipboard practices, affect safety. In the area of safety culture, three recommendations are central: (a) increase compliance with regulations, (b) implement a safety management system, and (c) implement a behavioral safety system. In general, this review indicates that more data are needed on human-technology-organizational issues in the maritime domain.

Epistemology in ethnography: assessing the quality of knowledge in human factors research

Quality measures are often used to judge research. This paper looks at what measures have been used in the human factors community to evaluate qualitative research and suggests some alternatives. Using ethnography as a test case, the paper raises the question of whether it is appropriate to use measures derived from quantitative and experimental research to judge the quality of qualitative studies, regardless of the subject and problem domain.

Shore-based pilotage: Pilot or autopilot? Piloting as a control problem

Remote, or shore-based, pilotage is an issue of some interest to the maritime community. When discussed, it is often in the context of new technology that in one way or the other is supposed to enhance piloting and enable ships to be piloted from the shore. This paper takes a different approach and instead looks at piloting as control of a complex system. Such an approach makes it possible to identify a fundamental problem with remote pilotage. The problem, along with possible solutions, is presented and discussed.

Sleep, Sleepiness, and Neurobehavioral Performance While on Watch in a Simulated 4 Hours on/8 Hours off Maritime Watch System

Seafarer sleepiness jeopardizes safety at sea and has been documented as a direct or contributing factor in many maritime accidents. This study investigates sleep, sleepiness, and neurobehavioral performance in a simulated 4 h on/8 h off watch system as well as the effects of a single free watch disturbance, simulating a condition of overtime work, resulting in 16 h of work in a row and a missed sleep opportunity. Thirty bridge officers (age 30 ± 6 yrs; 29 men) participated in bridge simulator trials on an identical 1-wk voyage in the North Sea and English Channel. The three watch teams started respectively with the 00–04, the 04–08, and the 08–12 watches. Participants rated their sleepiness every hour (Karolinska Sleepiness Scale [KSS]) and carried out a 5-min psychomotor vigilance test (PVT) test at the start and end of every watch. Polysomnography (PSG) was recorded during 6 watches in the first and the second half of the week. KSS was higher during the first (mean ± SD: 4.0 ± 0.2) compared with the second (3.3 ± 0.2) watch of the day (p < 0.001). In addition, it increased with hours on watch (p < 0.001), peaking at the end of watch (4.1 ± 0.2). The free watch disturbance increased KSS profoundly (p < 0.001): from 4.2 ± 0.2 to 6.5 ± 0.3. PVT reaction times were slower during the first (290 ± 6 ms) compared with the second (280 ± 6 ms) watch of the day (p < 0.001) as well as at the end of the watch (289 ± 6 ms) compared with the start (281 ± 6 ms; p = 0.001). The free watch disturbance increased reaction times (p < 0.001) from 283 ± 5 to 306 ± 7 ms. Similar effects were observed for PVT lapses. One third of all participants slept during at least one of the PSG watches. Sleep on watch was most abundant in the team working 00–04 and it increased following the free watch disturbance. This study reveals that—within a 4 h on/8 h off shift system—subjective and objective sleepiness peak during the night and early morning watches, coinciding with a time frame in which relatively many maritime accidents occur. In addition, we showed that overtime work strongly increases sleepiness. Finally, a striking amount of participants fell asleep while on duty.

Virtually being there: Human aspects of shore-based ship assistance

Shore-based ship assistance is a topic that increasingly is attracting attention from the maritime community. Subjects such as shore-based pilotage and VTS are often discussed and there is technological and political pressure towards more extensive forms of such assistance. Perhaps less often mentioned, but not less important, is the human side of these subjects. The present paper examines two of the central concerns for the people who actually work within today’s VTS centers, namely communication and trust. The study consisted of a literature review, study visits, observations and interviews.Communication and trust are found to be closely related, and one main finding is that adapting one’s means of communication to the context can be a very powerful (and necessary) tool for the creation of trust. Another important result is that the ability of the shore-based operator to see the situation from the viewpoint of the crew is crucial for the creation and maintenance of trust.

'Safety is everywhere' - The constituents of maritime safety

Although maritime safety is one of the key terms in regulation, guidelines and recommendations, such as SOLAS (International Convention for the safety of life at sea (IMO, 1974), in the shipping domain, there is, to the best of our knowledge, neither an explanation of this specific type of safety nor any explicit understanding on how it is promoted by those who work on board of merchant vessel. This qualitative study approaches maritime safety from a crew perspective and discusses what constituents should be considered to be part of maritime safety.

Gaps Between Users and Designers: A Usability Study About a Tablet-Based Application Used on Ship Bridges

© Springer International Publishing AG 2018. In recent years, Information Technology (IT) applications have been developed for the traditional shipping industry aiming at improving safety and efficiency, but the design vision is dominantly technology-centric without much attention being given to the user’s actual work experience or needs. A usability study is an approach to uncover the gap between users and designers. Although there is substantial research on usability, the values and usability of the tabletbased applications used on ship bridges have rarely been investigated. In this paper, a tablet-based computer application was developed to provide decision support to river pilots for passing under bridges in the Gothenburg area. Experienced pilots were invited to participate in a simulated navigational environment. By exploring the potential barriers in using such novel applications on a bridge, this study aims to address the human factor concerns for future IT design and developments in the maritime domain.

Ethnography re-engineered: the two tribes problem

Does ethnography have anything to offer to the engineering community or the computer development community? Theoretically, yes, it does. Ethnography can provide the skills and tools that will help us understand user needs and preferences, which can then be embedded into software and hardware. Still, it is difficult to find any discussion of commercial hardware or software products in which ethnography demonstratively played a decisive part, which has led some to argue that ethnography, as it is currently practiced in the computer development community, would never have any practical impact. Bader and Nyce [Bader, G. and Nyce, J.M., 1998. When only the self is real: theory and practice in the development community. Journal of Computer Documentation, 22 (1), 5–10] raised this issue a decade ago, and argued that ethnographic knowledge appeared to be largely unintelligible and inoperable to the computer development community. To date, this debate has not been taken much further, and the results of ethnographic research continue to be published in the HCI/Human Factors literature. The issues Bader and Nyce raised a decade ago have however not gone away: to what extent can ethnography make a practical contribution to the computer development community? This article picks up this discussion, re-examines the original arguments and commentary, adds a Koenian view of engineering epistemology to the analysis, and concludes that we appear to require a much improved understanding of engineering epistemology, to support interdisciplinary communication. Building on this foundation, what may furthermore be necessary is to perform an ethnographic operation twice, not just once: essentially, it is argued, it is necessary to build a kind of ethnography that takes the ‘interpretation’ of research findings to one’s clients as seriously as it does the interpretation of what goes on in a particular, ‘targeted’ workplace for end-users. By providing this kind of ‘double’ translation and interpretation, it would be possible to ‘deliver’ ethnographic findings to the engineering communities in a form they find intelligible, simply by doing what ethnography does best: the discovery and interpretation of what is taken to be self-evident and logical.