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Monthly Safety Scenario (MSS)

The Monthly Safety Scenario (MSS) is a Loss Prevention initiative to assist members in their efforts to comply with international safety regulations and to follow best practices.

The Club is publishing, every month, a new Monthly Safety Scenario (MSS) to assist owners in their efforts to comply with the above regulations. Alternative scenarios will be uploaded in SCOL. It is easy to download the MSS and enter the written conclusions from the meeting and send feedback to the shore-based organisation.

Right-click on the link below and select “Save target as…“ to save the pdf file on your computer.

MSS Case February: Leaking cargo hatch covers

The bulk carrier was loading wire coils. When loading was complete the crew taped across the transverse beams of all the cargo holds with Ram-Nek plastic gasket. During the vessel’s transit it sailed through heavy weather that lasted for about two days. During this time the vessel was pitching and rolling and the cargo hatches were covered in water.


While discharging in port it was found that the steel coils in the top tiers were corroded. The steel coils below the centreline and folding seams were the most affected.


A surveyor in attendance observed that the cargo hatch covers were not in an adequate condition. The greatest number of rusted coils were in holds 1 and 3.


The surveyor tested the water integrity of the cargo hatch covers with an ultrasonic device which detected significant defects to the sealing arrangements. The gaskets were in poor condition and the hatch covers tested positive for chloride which indicates that saltwater has leaked.

The non-return valves for the drain channel were also in a poor condition as they were clogged and the ball inside was not moving. The transverse packing on the hatch covers was leaking, there were some cracked corners and leaking side joints.

The surveyor also found a number of leaking ventilation covers.
The cargo hatches and gaskets were in a poor condition. The cleats could not be tightened beyond hand tightening.

Review the questions with your team in the latest Monthly Safety Scenario.


Under the ISM requirement, owners are obliged to carry out monthly safety meetings or safety committee meetings onboard their vessels. This obligation stems from Chapter 5 of the ISM Code: “Master’s responsibility and authority” and furthermore from “5.1.2, motivating the crew in the observation of that policy”.

The obligation can also be derived from the Code of “Safe Working Practices for Merchant Seamen”, where it is stated that the safety committee should meet regularly: “3.13.2, The frequency of meetings will be determined by circumstances but as a general guideline, the committee should meet about every 4-6 weeks”.

For more Loss Prevention information, please contact:

Scenarios archive

(older scenarios are available in SCOL)

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