Many factors have contributed to unsafe cargo operation either during loading or discharging at terminal. Therefore, it is important that the cargo handling operation on tankers is led by the Master or senior officer in-charge. Every crew member involved in the operation must be aware of his or her routine duties and emergency situations.

The necessary precautions and safety measures (in addition to SSSCL) to ensure a lesser risk and incident free operation includes:

1. Alarm system

Check alarm system prior cargo operation; include High Press/Low Press alarm, High Level/Over Fill alarm.


2. Close Cargo Tank Lids

All Cargo tanks lids must be in close position especially while alongside at terminal even empty or loaded.


3. Close Ullage Ports

All ullage ports must be kept close during cargo operations.


4. Close Sighting Ports

All sighting ports must be kept close during cargo operations at all times.


5. Cargo Pump

Check condition and purging of cargo pumps before loading / on passage to discharging port and ensure Emergency Cargo Pump ready to use in case of emergency.


6. Cargo hoses and flange connections

Cargo hoses and flange connections used for chemical / oil handling must be checked thoroughly before use


7. Stop ship Air Con if Required

If the AC system’s intake air is drawing cargo vapors, it should be stopped immediately and the intake ports of the accommodation area should be shut.

8. Keep an eye on mooring ropes

Mooring ropes must be monitored and tended regularly, Temporary stop cargo operations if necessary.

9. Keep personal protective equipment ready

All personal protective equipment must be worn and equipment such as gas detection and SCBA must be kept ready.

Crew must never ignore the above procedures as they are designed to prevent incidents such as Fire/Explosion, Cargo tank deformation, Cargo Damages, Pollution, and Health hazard.


  1. Strictly implement closed cargo operations.
  2. Refuse if terminal request for open cargo operation, issue Letter of Protest. Report immediately to office and wait further instruction from operation department.


  • SMS S-0503, S-0503T, S-0503TC, S-0503TG
  • ISGOTT – Chapter 24
  • ICS Tanker Safety Guide Chemicals Chapter 6;

ICS TSG Gas Chapter 4