Which of the following observations by a PSCO is more likely to result in "clear grounds for a more detailed inspection to take place? The CO2 fixed fire smothering system pipeline is found heavily corroded and patched Rat guards are missing from one of the mooring ropes The port clearance from the last t port is not available One of the ship s stores cranes is defective due to a burnt out motor

The observation by a PSCO (Port State Control Officer) that is more likely to result in "clear grounds for a more detailed inspection to take place" is:<br /><br />**The CO2 fixed fire smothering system pipeline is found heavily corroded and patched.**<br /><br />This observation indicates a significant safety concern, as the CO2 fixed fire smothering system is a critical component for fire safety on board the vessel. Heavy corrosion and patching of the pipeline suggest potential malfunction or failure of the system, which poses a risk to the safety of the vessel and its crew. Therefore, this observation provides clear grounds for a more detailed inspection to ensure the proper functioning of the fire safety system.<br /><br />The other observations, while important, are less likely to result in immediate grounds for a detailed inspection compared to the condition of the CO2 fixed fire smothering system pipeline.