Increasingly vessels are equipped with Vapour Emission Control Systems. Where provided, it is to be used and operated in accordance with current regulations and instructions contained in the vessel’s VEC System Operation Manual and in conjunction with the requirements and provisions of the shore installation.
Masters and Officers must be aware that significant operational and safety implications are present, as the shore and the ship are effectively joined together as one unit.
The primary hazards include:
- The ship loses effective control of the tank atmosphere pressure, and is directly influenced by any changes which may occur within the terminals system. It is therefore most important that associated pressure sensing devices on the vessel are well maintained. It is also essential that individual cargo tank P.V. valves are properly maintained and operate correctly.
- Vessels fitted with a VEC system must have an independent overfill alarm providing audible and visual warning. These are to be tested at the tank to ensure their proper operation prior to commencing loading, unless the system is provided with an electronic self-testing capability.
Fixed gauging systems must be maintained in a fully operational condition at all times.
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