Gas Dispersion through tank vents; There is a potential danger of fire and explosion if the flammable zone with emitted vapor reaches any location where there may be sources of ignition such as the follows; which one of these can be prevented easily by onboard systems?
Direct Answer
Option A: Superstructures and accommodation blocks into which the gas can enter through doors, ports or ventilation intakes.
Gas ingress into superstructures and accommodation blocks can be effectively prevented by onboard systems. These include automatic closure of ventilation intakes, maintaining positive pressure within these spaces, and ensuring all doors and ports are closed during cargo operations. This minimizes the risk of ignition sources within occupied areas, as emphasized in ISGOTT.
All Options
Detailed Explanation & Context
Gas ingress into superstructures and accommodation blocks can be effectively prevented by onboard systems. These include automatic closure of ventilation intakes, maintaining positive pressure within these spaces, and ensuring all doors and ports are closed during cargo operations. This minimizes the risk of ignition sources within occupied areas, as emphasized in ISGOTT.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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