Data Analysis and Decision on Navigation Safety of Yangshan Port Channel
Round 1
Reviewer 1 Report
Major changes needed:
1. The wind speed, wind direction and gust within the day is equally important for the port operator for a proactive planning. Therefore, statistics within the day should also be reported and discussed in similar fashion. If there is no specific data, inference and discussions can be given.
2. section 4 can be enhanced in discussion. Figure 6 is too small to see the statistical significance results. This can be improved.
3. To improve this paper, the traffic flow results under normal and interrupted setting can be presented in a statistical analysis approach like wind. A reader might be keen to relate the traffic flow (anchor, berthing, sailing) with wind parameters.
4. Following studies consider port region's environmental status in port operations planning. You can cite and discuss following papers:
- Daily berth planning in a tidal port with channel flow control. Transportation Research Part B: Methodological, 106, pp.193-217.
- Evaluating the solution performance of IP and CP for berth allocation with time-varying water depth. Transportation Research Part E: Logistics and Transportation Review, 87, pp.167-185.
-The multi-port berth allocation problem with speed optimization and emission considerations. Transportation Research Part D: Transport and Environment, 54, pp.142-159.
5. For future research you can match AIS data with wind statistics. You can discuss following works for examples on matching AIS data with ship physical properties.
- Data-driven financial and operational risk management: Empirical evidence from the global tramp shipping industry. Transportation Research Part E: Logistics and Transportation Review, 158, p.102617.
- Impacts of wind and current on ship behavior in ports and waterways: A quantitative analysis based on AIS data. Ocean Engineering, 213, p.107774.
Author Response
Dear Reviewer：
Please see the attachment.
We would like to thank you for your valuable comments on our manuscript. Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. I really appreciate all your comments and suggestions! In this round of revision, we have considered all comments carefully and have made corrections which we hope meet with approval.
I will upload a pdf file of my reply to your revised comments. Also, the full text of the revised article I have emailed to the editor.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This paper gives statistics about the wind direction and wind level on high wind control days with pilotage disruption at Yangshan Port from 2011 to 2020. It also gives the wind direction and wind level that cause pilotage disruption and models and analyzes the effects of different wind direction and wind level coupling on pilotage disruption. The authors reported that using the information from each of the 15 observation lines, the speed and time of ships in the warning area were calculated by adding up the speed, heading, and time in the records for each of the 16 ships. The traffic patterns of different kinds of ships were summed up to give the gale control warning something to go on. Despite the interesting problem being addresssed, I think this manuscript need to be improved further.
- Abstract
The authors need to describe the method being used to provide the analysis. Furthermore, the results described in the abstract doesn’t containts what is really being studied.
- Background & Motivation
this study, the authors start with With the vigorous development of the global trade and shipping industry. However supporting data has not been provided in the introduction. This can help the reader understand the background & motivation of this study.
- Lack of literature review.
The literature review regarding previous method being employed for the study need to be further described in detail. The authors can use tables to provide analysis on the research gap being addressed in this study.
- Clarity of the methods
+ The explanation regarding the statistical method being employed need detailed explanation.
Author Response
Dear Reviewer：
Please see the attachment.
We would like to thank you for your valuable comments on our manuscript. Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. I really appreciate all your comments and suggestions! In this round of revision, we have considered all comments carefully and have made corrections which we hope meet with approval.
I will upload a pdf file of my reply to your revised comments. Also, the full text of the revised article I have emailed to the editor.
Author Response File: Author Response.pdf
Reviewer 3 Report
This paper presented the “Data analysis and decision on navigation safety of Yangshan Port Channel”. This paper provides statistics on the wind direction and wind level on high wind control days under pilotage disruption at Yangshan Port for ten years. This study aims to analyse the effects of different wind directions and wind level coupling on pilotage disruption. Additionally, the difference in traffic flow in the alert area under normal and interrupted conditions of pilotage is analysed by combining the data of pilotage interruption and the observation data of the alert area observation line, and the law of traffic volume and speed of container ships of different lengths are also analysed. The contribution offers the traffic patterns of different types of ships that were summarised to be applied in the gale control warning. This paper is relevant and valuable to the readers of Sustainability. However, several places need to be revised. There, I recommend publication of this paper subject after major revision. The following changes to improve this paper was suggested.
1. On page 1, line 23 to 26, “With the vigorous development of the global trade and shipping industry, ……the risk of piloting has continued to increase” is a logical problem. I thought that the volume and risk of every port were not all increasing. It depends on different situations. You might consider describing it as “might increase”. In addition, I do not find any strong reference to support all the viewpoints in line 23 to 34. Please cite a proper reference here.
2. On page 1, line 26 to 28, although the authors stated that ship pilotage bears the critical responsibility of safeguarding national sovereignty and plays an active role in ensuring the safety of ship navigation, maintaining port order and cleaning up the water environment. However, I still do not understand the definition of ship pilotage. Please give a simple definition for ship pilotage and introduce it. I believe that most of the readers would like to know this information. Also, please remember to cite a reference.
3. All abbreviations must be written in full in their first appearance before using them in subsequent occurrences. For example, for the “FSA” method on page 1 with line 39 and “IMO” on page 1 with line 45, please show their full name.
4. The authors presented much previous relative research in the Introduction’s paragraph 2. However, they do not show any difference between this study. Maybe the authors emphasise that such research type is necessary, but I still hope to see the new brilliant. The value of this paper is not significant. This means that the authors shall demonstrate the difference between this study and the others. The authors may read more articles in this field and do dome examples to explain the differ from the other research to increase research values.
5. The literature is not sufficient. The literature section needs to thoroughly discuss the theory and concepts that build the proposed model. You need to discuss the basic theory, keywords, and constructs. Precision in the application of theory to create the proposed model needs improvement. I suggest that you can add more literature regarding pilot safety.
6. The authors offered less content for further research. It is not only now results but also needs to add more valuable comments to increase its values.
Author Response
Dear Reviewer：
Please see the attachment.
We would like to thank you for your valuable comments on our manuscript. Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. I really appreciate all your comments and suggestions! In this round of revision, we have considered all comments carefully and have made corrections which we hope meet with approval.
I will upload a pdf file of my reply to your revised comments. Also, the full text of the revised article I have emailed to the editor.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
the authors have addressed all reviewer comments.
Reviewer 3 Report
This paper presented the “Data analysis and decision on navigation safety of Yangshan Port Channel”. This paper provides statistics on the wind direction and wind level on high wind control days under pilotage disruption at Yangshan Port for ten years. This study aims to analyse the effects of different wind directions and wind level coupling on pilotage disruption. Additionally, the difference in traffic flow in the alert area under normal and interrupted conditions of pilotage is analysed by combining the data of pilotage interruption and the observation data of the alert area observation line, and the law of traffic volume and speed of container ships of different lengths are also analysed. The contribution offers the traffic patterns of different types of ships that were summarised to be applied in the gale control warning. This paper is relevant and valuable to the readers of Sustainability.
The authors have put their best efforts to execute this paper, they have covered all the aspects very comprehensively. I am delighted to accept the paper without further comments. Thanks.
