The distinction between 'crew negligence' and 'crew incompetence' and the consequence thereof
Assume a ship with only two valves (No.1 & No.2). Valve No.1 is the one that should be handled, the correct valve. Valve No.2 is the wrong valve and should be kept closed during cargo operations because, if handled, there will be a cargo contamination. Both valves are properly marked and labelled and located in the same room at a distance from each other.
Whilst cargo operations are in progress at the port, the Chief Officer instructs, over the walkie-talkie, a deck cadet (who is for the first time at sea) to go into the valve room and open valve No.1. The deck cadet does so but, instead of opening valve No.1 as instructed by the Chief Officer, he opens valve No.2 resulting in cargo contamination and a huge cargo claim. Will the shipowner be required to satisfy the cargo claim? Or, will he manage to escape liability by relying on the cadet's negligence?
In other words, was it negligence or incompetence? If it was the former the shipowner might be able rely on the 'crew negligence' defence, but if it was the latter the ship would be held unseaworthy due to having an incompetent crew. Such unseaworthiness would be causative and the shipowner, then, should pay for the cargo claim.
Therefore, in the above factual context, the crucial question is: negligence or incompetence?
The answer is simple: it can be either negligence or incompetence. On an ultimate analysis, the starting point is the mental state of the cadet at the time of his mistake. If he opened valve No.2 believing, at that very moment, that he opened valve No.1 then we are entering the path of negligence. If, however, he opened valve No.2 believing, at that very moment, that the valve he opened was the valve he should open, i.e. the correct valve, then we are led to the path of incompetence.
This is, however, the starting point only and a whole range of inquiries would be required to establish the cadet's negligence or incompetence. Do not rush to conclude that it was incompetence from the mere fact that it was his first time at sea. All those who have served on board merchant ships are well aware that handling valves is a daily routine for cadets. Otherwise, a master in command for the first time would be, by definition, incompetent as would anybody else holding a post for the first time and such an outcome would violate common sense. This brief article gives some guidance as to what may constitute incompetence as derived from the existing case law.