A Master is under pressure to complete a hot work repair before departure, but the gas-free test on an adjacent tank has come back marginal/borderline rather than clearly safe. What is the correct decision?
A. Do not authorise the work — a borderline or marginal result is treated as a fail; ventilate further and re-test until a clear, unambiguous safe reading is obtained, even if this delays departure
B. Average the borderline reading with a previous good reading to justify proceeding
C. Authorise the work since the reading is "close enough" and departure is time-critical
D. Proceed with extra fire watch personnel as a substitute for a clear test result
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A. Any task lasting longer than 30 minutes
B. Only welding using electric arc equipment
C. Any work involving an open flame, welding, burning, grinding, or any process that produces sufficient heat or sparks to act as a source of ignition for flammable materials, gases, or vapours
D. Only work carried out inside a cargo tank
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A. A clear radius of at least 10 metres (or as defined by the risk assessment for the specific task and materials), with all combustibles removed or adequately shielded
B. No clearance is needed if a fire extinguisher is present
C. Clearance is only relevant for work carried out in an engine room
D. 1 metre is always sufficient regardless of the work type
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