Heritagising the South China Sea: appropriation and dispossession of maritime heritage through museums and exhibitions in Southern China.

With the emergence of critical heritage studies, scholars show that 'bottom up' initiatives that blur the boundaries between private, civil, and state have arisen not as a modernising vision to legitimise national authority but as 'rooted in identification with local community', linking past and future. In China, such studies demonstrate the emergence of a different kind of museology - with 'private' heritage initiatives on behalf of individuals and groups - tolerated by the state authorities through investments that link heritage tourism to development. However, when a maritime vision of national history is at stake, the central state would co-opt 'private' heritage initiatives to subsume them under the wider, sanitised narrative of Chinese maritime civilisation that requires a different relation to the past and its extraction from the localities that do not inscribe their heritage into these universalised visions. Zooming in on three museums in Hainan related to the South China Sea (SCS), I reveal the contradictory claims made by different actors regarding the use, representation and ownership claims of historical seafaring in terms of cultural heritage. Therefore, I argue that heritagisation of seafaring in the SCS represent proprietary and thus territorial claims for China's rhetoric of maritime ecological civilisation.

Systematic Review: Measurement Methods and Concept of Resilience Among Seafarers.

Shipping is considered a demanding environment that can significantly impact seafarers' well-being and mental health. This review aims to examine existing literature on the resilience of seafarers, with a focus on the measurement methods used. Furthermore, this study intends to gain a comprehensive understanding of the current state of research in the field of seafarers' resilience, examining the variations in defining and conceptualizing resilience across different studies and contexts. The review identified 99 studies published between 2003 and 2023, with ten studies being included in the final analysis. These studies employed various measurement methods and provided definitions of resilience. Five questionnaires were identified, with the Dispositional Resilience Scale-15 (DRS-15) being the most commonly used. Two of the selected studies had a longitudinal follow-up, while eight were cross-sectional. Four studies related to tankers, and an additional four studies focused on naval vessels, while two studies did not specify the vessel type. The publications were distributed in the period between 2003 and 2013 (two papers) and between 2013 and 2023 (eight papers). The identified themes encompassed shipboard stressors (three papers), sleep problems (two papers), occupational groups or attitudes (two papers), experiences in war (two papers), and intervention measures (one paper), highlighting the multidimensional nature of resilience within the maritime field. This review suggests a research gap, as it reveals that the topic of resilience in seafaring has been sparsely represented. Despite an increasing interest in recent years, research remains limited, particularly in the civilian maritime sector. Therefore, this review highlights the importance of understanding and promoting resilience among seafarers. While the variety of questionnaires used was limited, achieving consensus and standardization in resilience measurement is essential for more comparable and consistent research findings. Recognizing resilience as a crucial resource can promote the development of targeted interventions and support systems, enhancing seafarers' well-being and mental health.

"I Constantly Feel Worn Out": Mixed-methodology Approach to Seafarers' Sleep on Board.

Although seafaring is one of the most important professions for trade in goods in the 21st century, the results of recent research indicate that seafarers face various sources of stress in their work, including high workload and long working hours. These stressors can be reflected in low job satisfaction and poor mental health, which can result in sleep problems, and consequently lead to various somatic symptoms. The main goal of this mixed method research was, therefore, to expand knowledge about seafarers' sleep on board, whereby a sequential explanatory design was used. Study 1 (N = 286 male seafarers from Croatia) examined whether the number of sleep hours on board has a mediating role in explaining the relationship between job satisfaction and mental health as predictors of somatic symptoms. The results of the path analysis showed that higher job satisfaction directly and indirectly through longer sleep on board reduces the number of somatic symptoms, while better mental health directly contributes to fewer somatic symptoms. Study 2 (N = 205 seafarers from Croatia) aimed to get a deeper insight into the sleep of seafarers on board, whereby 39% (N = 80) of the participants had difficulties related to sleep problems on board. The thematic analysis of their answers (N = 76) showed the sleeping difficulties experienced by seafarers on board and gave an insight into the consequences of sleeping difficulties and the coping strategies they use. The results of this research indicate the importance of developing healthy work environments for seafarers.

A Study of Psychometric Instruments and Constructs of Work-Related Stress among Seafarers: A Qualitative Approach.

Due to unpredictable and demanding working circumstances and the significant potential for dangers and accidents, seafaring has been characterised as one of the world's riskiest and stressful vocations that lead to physical and mental health problems. However, very few instruments measure work-related stress, particularly in a seafaring context. None of the instruments are psychometrically sound. Therefore, a valid and reliable instrument to measure seafaring work-related stress is indispensable. This study aims to review work-related stress instruments and to explore the work-related stress construct among seafarers in Malaysia. This study uses a systematic review and semi-structured interviews across two phases. In Phase 1, we conducted a systematic review of several databases: Academic Search Ultimate, Emerald Journal Premier, Journal Storage (JSTOR), ScienceDirect, Springer Link, Taylor and Francis Online, and Wiley Online Library based on Preferred Reporting Items for Systematic Review and Meta-analyses (PRISMA). In 8975 articles, only 4 (four) studies used psychological instruments and 5 (five) studies used survey questionnaires to measure work-related stress. In Phase 2, we conducted a semi-structured interview with 25 (twenty-five) seafarers, online due to COVID-19 restrictions. The semi-structured interview indicated 6 (six) themes, namely, physical stress, personal issues, social living onboard, technostress, work factors, and the effect of the COVID-19 pandemic. In conclusion, the present study has identified three psychometric instruments for measuring work-related stress among seafarers: The Psychological General Well-Being Index, Perceived Stress Scale, and Job Content Questionnaire. We also found psychometric elements in some of the instruments are questionable, such as theoretical basis, construct development, and inadequate internal consistency value. In addition, this study also found that work-related stress is a multidimensional construct that needs to be studied based on work contexts. The findings of this study can contribute to the body of knowledge of a work-related stress construct in a seafaring context and could help to inform policy makers in the maritime industry. This study suggests a psychological instrument to measure work-related stress among seafarers in future studies.

Sleep Architecture and Sleep-Related Breathing Disorders of Seafarers on Board Merchant Ships: A Polysomnographic Pilot Field Study on the High Seas.

As seafarers are assumed to have an increased risk profile for sleep-related breathing disorders, this cross-sectional observational study measured (a) the feasibility and quality of polysomnography (PSG) on board merchant ships, (b) sleep macro- and microarchitecture, (c) sleep-related breathing disorders, such as obstructive sleep apnea (OSA), using the apnea-hypopnea index (AHI), and (d) subjective and objective sleepiness using the Epworth Sleepiness Scale (ESS) and pupillometry. Measurements were carried out on two container ships and a bulk carrier. A total of 19 out of 73 male seafarers participated. The PSG's signal qualities and impedances were comparable to those in a sleep laboratory without unusual artifacts. Compared to the normal population, seafarers had a lower total sleep time, a shift of deep sleep phases in favor of light sleep phases as well as an increased arousal index. Additionally, 73.7% of the seafarers were diagnosed with at least mild OSA (AHI ≥ 5) and 15.8% with severe OSA (AHI ≥ 30). In general, seafarers slept in the supine position with a remarkable frequency of breathing cessations. A total of 61.1% of the seafarers had increased subjective daytime sleepiness (ESS > 5). Pupillometry results for objective sleepiness revealed a mean relative pupillary unrest index (rPUI) of 1.2 (SD 0.7) in both occupational groups. In addition, significantly poorer objective sleep quality was found among the watchkeepers. A need for action with regard to poor sleep quality and daytime sleepiness of seafarers on board is indicated. A slightly increased prevalence of OSA among seafarers is likely.

Healthy workplace onboard: Insights gained from the COVID-19 impact on mental health and wellbeing of seafarers.

BACKGROUND: Seafarers' mental health is seriously affected by COVID-19. The pandemic could act as a catalyst for change with respect to seafarers' mental health protection and promotion. OBJECTIVE: The study explores the main factors contributing to the mental health and wellbeing of seafarers. Moreover, elements to help seafarers lessen the impact of the pandemic on their work and life onboard are analyzed, and their role in developing a positive psychosocial environment and promoting a healthy workplace onboard are discussed. METHODS: The study involved the use of an ad hoc questionnaire and the adoption of both quantitative and qualitative methods. The sample included one hundred and five active seafarers. RESULTS: Ninety-six percent of the sample stated that mental health is a very or extremely important part of their general health. Seafarers perceive that their mental health has been seriously impacted by COVID-19. Major factors contributing to seafarers' mental health and wellbeing reveal three groups of factors: rest and spare time-related factors, communication/relationship with the external world, and interaction and social life on board factors. CONCLUSIONS: Strategies suggested by seafarers for coping with "inevitable" psychological stress produced by COVID-19 and promoting their wellbeing include managerial, emotional, facilities-related (including communication infrastructure), physical, and social elements to promote wellbeing. Economic, intellectual, and spiritual elements also have to be taken into consideration and require further investigation. Building on seafarers' insights and experiences, a healthy environment onboard should cultivate holistically the four main spheres of a healthy workplace (physical work environment, psychosocial work environment, personal health resources, and enterprise community involvement) and the five features of a healthy psychosocial environment (social, emotional, physical, intellectual and spiritual) under all circumstances, whether exceptional or ordinary.

Interactions between Human Gut Microbiome Dynamics and Sub-Optimal Health Symptoms during Seafaring Expeditions.

During long ocean voyages, crew members are subject to complex pressures from their living and working environment, which lead to chronic diseases-like sub-optimal health status. Although the association between dysbiotic gut microbiome and chronic diseases has been broadly reported, the correlation between the sub-optimal health status and gut microbiome remains elusive. Here, the health status of 77 crew members (20-35 years old Chinese, male) during a 135-day sea expedition was evaluated using the shotgun metagenomics of stool samples and health questionnaires taken before and after the voyage. We found five core symptoms (e.g., abnormal defecation frequency, insomnia, poor sleep quality, nausea, and overeating) in 55 out of 77 crew members suffering from sub-optimal health status, and this was termed "seafaring syndrome" (SS) in this study. Significant correlation was found between the gut microbiome and SS rather than any single symptom. For example, SS was proven to be associated with individual perturbation in the gut microbiome, and the microbial dynamics between SS and non-SS samples were different during the voyage. Moreover, the microbial signature for SS was identified using the variation of 19 bacterial species and 26 gene families. Furthermore, using a Random Forest model, SS was predicted with high accuracy (84.4%, area under the concentration-time curve = 0.91) based on 28 biomarkers from pre-voyage samples, and the prediction model was further validated by another 30-day voyage cohort (accuracy = 83.3%). The findings in this study provide insights to help us discover potential predictors or even therapeutic targets for dysbiosis-related diseases. IMPORTANCE Systemic and chronic diseases are important health problems today and have been proven to be strongly associated with dysbiotic gut microbiome. Studying the association between the gut microbiome and sub-optimal health status of humans in extreme environments (such as ocean voyages) will give us a better understanding of the interactions between observable health signs and a stable versus dysbiotic gut microbiome states. In this paper, we illustrated that ocean voyages could trigger different symptoms for different crew member cohorts due to individual differences; however, the co-occurrence of high prevalence symptoms indicated widespread perturbation of the gut microbiome. By investigating the microbial signature and gut microbiome dynamics, we demonstrated that such sub-optimal health status can be predicted even before the voyage. We termed this phenomenon as "seafaring syndrome." This study not only provides the potential strategy for health management in extreme environments but also can assist the prediction of other dysbiosis-related diseases.

A Life Less than Ordinary: The Schooner Ocean (1821-1865).

The East Winner Bank Shipwreck takes its name from the southern sandbank on Hayling Island near Portsmouth, UK. Examination of the wreck indicates a 19th-century carvel-built vessel. The sandbank is an active environment, meaning the wreck is rarely exposed to its full extent. Discussed here is work completed on the site before and during the social-distancing restrictions imposed by COVID-19. Documentary sources and previous detailed surveys suggest a possible identification for the wreck. The site appears to be an example of an everyday 19th-century coastal trading vessel, rarely explored archaeologically in the UK, with potential to contribute to discussions of the maritime technologies and maritime cultural landscape of regular folk. The investigation represents an excellent example of combining historical and archaeological data sets to further the interpretation of both sources, revealing details about the ship and its lasting impact on this stretch of coastline.

El naufragio del East Winner Bank toma su nombre del banco de arena del sur en la isla de Hayling cerca de Portsmouth, Reino Unido. El examen de los restos del naufragio indica que se trataba de una embarcación construida con casco liso de tablaje del siglo XIX. El banco de arena es un entorno activo, lo que significa que los restos del naufragio rara vez están expuestos en toda su extensión. Aquí se aborda el trabajo completado en el sitio antes y durante las restricciones de distanciamiento social impuestas por COVID-19. Fuentes documentales y estudios detallados previos sugieren una posible identificación del naufragio. El sitio parece ser un ejemplo de un barco comercial costero del siglo XIX, rara vez explorado arqueológicamente en el Reino Unido, con potencial para contribuir a las discusiones sobre las tecnologías marítimas y el paisaje cultural marítimo de la gente común. La investigación representa un excelente ejemplo de la combinación de conjuntos de datos históricos y arqueológicos para promover la interpretación de ambas fuentes, revelando detalles sobre el barco y su impacto duradero en este tramo de costa.

L'épave de l'East Winner Bank tire son nom du banc de sable au sud de l'Île de Hayling près de Portsmouth, au Royaume-Uni. L'étude de l'épave indique qu'il s'agit d'un vaisseau du 19ème siècle bordé à franc-bord. Le banc de sable est un environnement actif, ce qui implique que l'épave est rarement exposée dans sa totalité. La discussion porte ici sur le travail effectué sur le site avant et durant les restrictions de distanciation sociale imposées par la COVID-19. Les sources documentaires et les études détaillées antérieures suggèrent une identification possible de l'épave. Le site semble être un exemple de bateau courant de négoce côtier du 19ème siècle, faisant rarement l'objet d'une exploration archéologique au Royaume-Uni et ayant le potentiel de contribuer aux discussions sur les technologies maritimes ainsi que le paysage culturel maritime des gens ordinaires. La recherche constitue un excellent exemple de combinaison d'ensembles de données historiques et archéologiques pour approfondir l'interprétation des deux sources et révélant des détails sur le vaisseau et son impact durable sur cette portion du littoral.

Online survey among maritime pilots: job-related stress and strain and the effects on their work ability.

BACKGROUND: Maritime pilots often navigate ships through challenging waterways. The required 24 h standby rotation system (ROS) poses a stressful working situation. This study aims to describe the current job-related stress and strain among maritime pilots and the effects on their work ability, taking into account the different rotation systems. METHODS: Within a cross-sectional survey, pilots of all German pilots' associations were asked to complete an online questionnaire. The 1-week ROS (port pilots) was compared with the 4-month ROS (sea and canal pilots). The pilots' subjective perception of stress and strain was assessed using an established ship-specific questionnaire. Daily sleepiness and work ability were examined respectively using the Epworth Sleepiness Scale (ESS) and the Work Ability Index (WAI). RESULTS: The study group consisted of 401 male German pilots with an average age of 48.5 years (participation rate 46.9%). More than 50% of the pilots evaluated irregular working hours as the main stressor in their job. 79.8% of the pilots (especially 4-month ROS) experienced high psychological demands in their workplace. 83.3% stated having regularly neglected their private obligations due to job assignments. Pilots from the 4-month ROS experienced insufficiently predictable free time and long operation times at a stretch as stressors (p < 0.001 and p = 0.037). Elevated daily sleepiness was found in 41.9% of the pilots. The overall evaluation of the WAI questionnaire showed good to very good work ability at 77.3%. Additionally, no significant differences in the daily sleepiness or the work ability were observed between the pilots of the different two ROS. CONCLUSIONS: Due to their subjectively higher job-related mental demands, their disturbed work-life balance, and their long operation times at a stretch, it is likely that pilots from the 4-month ROS have significantly higher job stress compared to those in the 1-week ROS. However, this does not lead to more sleepiness or reduced work ability, which suggests that the pilots of this ROS are highly adapted to their working situation. Nevertheless, intervention measures with shortened ROS amongst sea and canal pilots' associations should be tested in respect of benefit, practicability and acceptance by the pilots.

Measurement Methods of Fatigue, Sleepiness, and Sleep Behaviour Aboard Ships: A Systematic Review.

Since seafarers are known to be exposed to numerous job-related stress factors that can cause fatigue, sleepiness, and disturbed sleep behaviour, the aim of this review was to provide an overview of the subjective and objective measurement methods of these strains. Using a systematic review, 166 studies were identified within the period of January 2010 to December 2020 using the PubMed database. Of the 21 studies selected, 13 used both subjective and objective measurement methods. Six studies used only subjective and two studies only objective methods. For subjective assessment, 12 different questionnaires could be identified as well as activity and sleeping logs. Actigraphy and reaction time tests (RTT) were the most common objective methods. In single cases, electrooculography (EOG), pupillometry and ambulatory polysomnography (PSG) were used. Measurement-related limitations due to vessel-related impacts were less often reported than expected. No restrictions of daily routines on board were described, and only single-measurement disturbances due to ship movements were mentioned. The present literature review reveals that there are various routines to measure fatigue, sleepiness, and sleep behaviour on board. A combination of subjective and objective methods often appears to be beneficial. The frequent use of actigraphy and RTT on board suggests good feasibility and reliable measurements with these methods. The use of ambulatory PSG in maritime-like contexts suggests that this method would also be feasible on board.

Seafarers' well-being in the context of the COVID-19 pandemic: A qualitative study.

BACKGROUND: The public health strategies for prevention of SARS-CoV-2 infection have included closing the national borders and cancelling international flights, which has severely affected free crew changes. This caused prolonged stay on board or at home for seafarers, who should be recognized as 'key' workers regarding their essential role in maintaining the flow of vital goods. OBJECTIVE: Using a general inductive approach, this qualitative study aims to describe how the COVID-19 pandemic reflects on seafarers' well-being. The study focused on obtaining personal experiences from seafarers on board, and seafarers at home, relating to the current world pandemic. METHODS: A convenience sample consisting of 752 seafarers from the international seafarers' population participated in an online study in spring 2020. The questionnaire used included questions relating to basic sociodemographic and work characteristics, and one open question which addressed seafarers' personal experiences. The data obtained was analysed by thematic analysis. RESULTS: The emerged themes included mental, physical, social and economic well-being. Most of the answers of seafarers located on board related to threatened mental, physical and social well-being, while seafarers at home reported mostly on threats to their economic well-being. CONCLUSION: Seafarers' well-being is seriously threatened by preventive measures relating to the COVID-19 pandemic. Results are discussed in relation to earlier findings in the area of occupational stress in seafaring. Overall, the data obtained portrays existing underlying occupational structures in the seafaring sector, which are rendered more visible due to the COVID-19 pandemic. In short, seafarers describe their reality as far away from the concept of 'key' or 'essential' workers.

The impact of the Maritime Labor Convention on seafarers' working and living conditions: an analysis of port state control statistics.

BACKGROUND: The Maritime Labour Convention, 2006 (MLC2006) entered into force in August 2013 and is a milestone for better working and living conditions (WLC) for seafarers. As of March 2020, 96 countries have ratified the MLC2006, covering more than 90% of the world's shipping fleet. A system of port state control (PSC) allows ratifying countries to inspect any foreign ship arriving in their ports for compliance with the convention. It is intended as a second safety measure for the identification of substandard ships that sail all over the world. Nine regional agreements, so-called Memoranda of Understanding (MoU), have been signed to coordinate and standardize PSC inspections and to increase efficiency by sharing inspections and information. This paper uses public PSC statistics to evaluate the impact of the MLC2006. METHODS: A preliminary analysis using registered tonnage and MLC2006 ratification was conducted and seven MoU were selected for the analysis. The annual reports of these MoU have been viewed in September 2019. Numbers on annual inspections, deficiencies and detentions and in particular data for deficiencies related to living and working conditions and certificates and documents, have been extracted and analyzed for the years 2010 to 2017. RESULTS: Across the eight-year period analyzed, inspection numbers remained stable among all MoU authorities. Deficiencies overall and deficiencies related to WLC declined, indicating an improvement in conditions overall and an increased focus on seafarers' conditions on board. After the MLC2006 entered into force, three MoU reported WLC-ratios above 14%, while the numbers didn't rise above 10% in the other four authorities. Deficiencies related to certificates and documents did not rise significantly between 2010 and 2017. Two European MoU showed the highest ratios for deficiencies in both categories analyzed. CONCLUSION: The analysis confirmed that an increasing attention is being paid to the inspection of working and living conditions, especially in European countries. However, a clear positive impact of the MLC2006 could not be determined from the PSC statistics in this analysis. A large variation still exists among the MoU, a fact that demands increased efforts for harmonization of PSC procedures.

Is physical and psychological work stress associated with fatigue in Danish ferry ship employees?

BACKGROUND: Fatigue is a recognised risk factor for safety in seafaring. While always dangerous, fatigue in ferry shipping is especially hazardous as it may jeopardise passengers' safety. To counteract fatigue, knowledge on its determinants is important. Little, however, is known on the influence from physical and psychosocial work environment factors within ferry shipping. The aim of the study was to investigate the association between work stress in terms of physical stressors, perceived job demands and job control and different dimensions of fatigue among ferry ship employees and to test whether a potential effect of work stress was mediated by sleep satisfaction. MATERIALS AND METHODS: The design was cross-sectional. 193 respondents answered to a self-administered questionnaire including standardised scales, i.e. the Swedish Occupational Fatigue Inventory and the Copenhagen Psychosocial Questionnaire for job demands and control. The association of risk factors with fatigue was determined using hierarchical multiple linear regression analyses. RESULTS: Physical work stressors were positively associated with only one of five fatigue subscales: lack of energy. Higher levels of demands were related to more lack of energy, lack of motivation, physical exertion and sleepiness, while more control was related to lesser lack of energy, lack of motivation and sleepiness. No demand-control interaction was found. Effects of demand and control were partly mediated by sleep satisfaction. CONCLUSIONS: Although limited by its cross-sectional design this study provides support for the independent relevance of demands and control for employee fatigue in ferry shipping and for a mediating role of sleep satisfaction.

Follow-up of citations of maritime epidemiological injury studies.

BACKGROUND: The article is based on a review and follow-up of the citations of 13 epidemiological studies that aimed to improve maritime health and safety. While it's well-recognised that epidemiology is needed in occupational health and safety, the main research question: "How can epidemiology help workers to return healthy from the sea" was unanswered. MATERIALS AND METHODS: The 13 articles were selected as a representative sample of different epidemiological design studies intended to contribute to improving safety management in fishing, merchant shipping and offshore industry. The PubMed, Research Gate, Cochrane-Library and Google Scholar were searched for authors that had cited our articles by using full bibliographic information and the results analysed. RESULTS: In all, 213 citation records were identified. After duplicates and records with insufficient information were removed, 123 full-text articles were eligible for evaluation with answers to the research questions: how did other authors use the studies, how has the injury epidemiology been developed, which recommendations are given for new policies and new studies and how can epidemiology help workers return safe and healthy from the sea? CONCLUSIONS: The answer to the main research question is yes, epidemiological studies are not only useful but a necessary component by providing the needed evidence for successful prevention programmes.

Sleepiness of day workers and watchkeepers on board at high seas: a cross-sectional study.

OBJECTIVES: To estimate the prevalence of sleepiness on duty among day workers and watchkeepers on board. DESIGN: Cross-sectional survey in a maritime field study. SETTING: 10 shipping companies with container vessels under German management. PARTICIPANTS: The whole crew (75 day workers and 123 watchkeepers) during 18 voyages on 18 different container ships. OUTCOME MEASURES: Sleepiness on duty and efficiency of sleep using pupillometry (in a cross-shift design) and the SenseWear armband activity monitor. RESULTS: The watchkeepers showed significantly shorter sleep periods than day workers (5.5 hours vs 5.8 hours). The average efficiency of sleep was 69.6% and significantly lower among watchkeepers (OR 0.48; 95% CI 0.26 to 0.88). 396 pupillometric examinations were carried out and revealed 88 study members (22.2%) with a pupillary unrest index (rPUI) in a range characterised as 'unfit for duty' and 110 seafarers (27.8%) categorised as 'particular attention required'. The average rPUI was similar between day workers and watchkeepers. The Epworth Sleepiness Scale revealed recent daytime sleepiness in 70 seafarers, which was similarly often stated by day workers and watchkeepers. Based on the Stanford Sleepiness Scale (SSS), a measurable cross-shift increase in the SSS value during the examined shift was observed, especially among watchkeepers. The amount of time already spent on the vessel at the time of the present examination was significantly associated with the rPUI (p=0.009). CONCLUSION: Sleep periods of both the day workers and the watchkeepers aboard vessels were alarmingly short and sleep efficiency was low. Sleepiness on duty is similarly prevalent among day workers and watchkeepers and seems to depend partly on the cumulative working period on the vessels. Preventive measures need to be taken by the shipping industry to counteract fatigue (eg, by enabling sufficient rest and sleep times).

Radiocarbon dates and Bayesian modeling support maritime diffusion model for megaliths in Europe.

There are two competing hypotheses for the origin of megaliths in Europe. The conventional view from the late 19th and early 20th centuries was of a single-source diffusion of megaliths in Europe from the Near East through the Mediterranean and along the Atlantic coast. Following early radiocarbon dating in the 1970s, an alternative hypothesis arose of regional independent developments in Europe. This model has dominated megalith research until today. We applied a Bayesian statistical approach to 2,410 currently available radiocarbon results from megalithic, partly premegalithic, and contemporaneous nonmegalithic contexts in Europe to resolve this long-standing debate. The radiocarbon results suggest that megalithic graves emerged within a brief time interval of 200 y to 300 y in the second half of the fifth millennium calibrated years BC in northwest France, the Mediterranean, and the Atlantic coast of Iberia. We found decisive support for the spread of megaliths along the sea route in three main phases. Thus, a maritime diffusion model is the most likely explanation of their expansion.

Seafarers' views on the impact of the Maritime Labour Convention 2006 on their living and working conditions: results from a pilot study.

BACKGROUND: The Maritime Labour Convention 2006 (MLC2006) entered into force in 2013 and is the first comprehensive set of standards for better living and working conditions covering aspects such as wages, contracts, food, medical care and social security. Currently, the Convention covers more than 90% of the world's shipping fleet. The aim of the study was to investigate the impact of the MLC2006 on the living and working conditions of seafarers and to test and adjust the methods for future use through a pilot study. This article presents the seafarers' perceived impact of MLC2006. MATERIALS AND METHODS: A mixed-method research approach was used (February to April 2018). The quantitative data of 55 seafarers were analysed using descriptive statistics. Qualitative data obtained through a focus group interview and thematic content analysis was applied. RESULTS: Remarkably, one third of the respondents pointed out a complete lack of improvement, while 43.6% stated that the MLC2006 had improved their working and living conditions "somewhat" and only 7.3% "to a great extend". The focus group participants agreed that the MLC2006 did not improve working conditions but mostly increased paperwork. Other issues of concern were the safety on board including safety training, long working hours connected to low manning, food and social difficulties. CONCLUSIONS: For Danish seafarers, the MLC2006 did not have a significant impact, as most standards were in place before. It must be further investigated what the MLC2006 achieved for other flag states, especially in the light of its 5-year anniversary. Both methods yielded valuable data. Focus groups are an ideal setting to study the views of seafarers.

Seafarers' perceptions of job demand: A cross-sectional study.

This study offers an insight regarding seafarers' perceptions of factors of psychological distress on shipboard. To identify stressors on maritime workers, a cross-sectional survey was conducted targeting a population of workers of Italian shipping companies sailing across the world. The research aimed to investigate workers' demographic and professional characteristics and the ways they influence perception of job fatigue, using an Italian version of the Karasek questionnaire. Of the involved seafarers, 80.1% returned the questionnaire, yielding a mean level of perceived job demand of 32.8 points and a mean level of perceived decision latitude of 65.5 points; 37.2% of interviewees stated having a scarce level of decision latitude. The results of the multivariate logistic regression models allowed assessment of the seafarers' characteristics related to their perception of job strain. These results confirm the need for measures that prevent stress factors in maritime workers.

Using seafaring simulations and shortest-hop trajectories to model the prehistoric colonization of Remote Oceania.

The prehistoric colonization of islands in Remote Oceania that began ∼3400 B.P. represents what was arguably the most expansive and ambitious maritime dispersal of humans across any of the world's seas or oceans. Though archaeological evidence has provided a relatively clear picture of when many of the major island groups were colonized, there is still considerable debate as to where these settlers originated from and their strategies/trajectories used to reach habitable land that other datasets (genetic, linguistic) are also still trying to resolve. To address these issues, we have harnessed the power of high-resolution climatic and oceanographic datasets in multiple seafaring simulation platforms to examine major pulses of colonization in the region. Our analysis, which takes into consideration currents, land distribution, wind periodicity, the influence of El Niño Southern Oscillation (ENSO) events, and "shortest-hop" trajectories, demonstrate that (i) seasonal and semiannual climatic changes were highly influential in structuring ancient Pacific voyaging; (ii) western Micronesia was likely settled from somewhere around the Maluku (Molucca) Islands; (iii) Samoa was the most probable staging area for the colonization of East Polynesia; and (iv) although there are major differences in success rates depending on time of year and the occurrence of ENSO events, settlement of Hawai'i and New Zealand is possible from the Marquesas or Society Islands, the same being the case for settlement of Easter Island from Mangareva or the Marquesas.

Marine turtles used to assist Austronesian sailors reaching new islands.

Austronesians colonized the islands of Rapa Nui, Hawaii, the Marquesas and Madagascar. All of these islands have been found to harbor Austronesian artifacts and also, all of them are known nesting sites for marine turtles. Turtles are well known for their transoceanic migrations, sometimes totalling thousands of miles, between feeding and nesting grounds. All marine turtles require land for nesting. Ancient Austronesians are known to have had outstanding navigation skills, which they used to adjust course directions. But these skills will have been insufficient to locate tiny, remote islands in the vast Indo-Pacific oceans. We postulate that the Austronesians must have had an understanding of the marine turtles' migration patterns and used this knowledge to locate remote and unknown islands. The depth and speed at which marine turtles migrate makes following them by outrigger canoes feasible. Humans have long capitalized on knowledge of animal behavior.