A hot work permit has been issued for welding on deck near a fuel tank vent. Partway through the job, the wind direction shifts, carrying vapour from the vent towards the work site. What should happen?

A. Only the fire watch needs to be informed; the work itself can continue

B. Continue, since the permit was validly issued regardless of subsequent changes

C. Stop work immediately and reassess — a permit reflects the conditions at the time of issue, and a changed wind direction introducing vapour risk invalidates those conditions until re-tested and re-authorised

D. Move slightly further along the deck without re-testing or re-authorising

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

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