What qualification must all small boat crew members possess?

The qualification that small boat crew members must possess is being a 2nd class swimmer. This standard ensures that crew members have a sufficient level of swimming ability to respond effectively in emergency situations, such as crew overboard scenarios. A 2nd class swimmer is typically defined as someone who can comfortably and safely swim a certain distance, which is essential for anyone working on or near water.

Having this level of swimming proficiency indicates that the individual has basic water safety skills, which is crucial for the safety of both the crew and passengers aboard small boats. This qualification prepares crew members to handle emergencies and contributes to a safer boating environment.

The other options represent higher qualifications or irrelevant certifications that do not align with the necessary requirement for small boat crew members. In a typical operational context, it is important to ensure that all crew members can at least meet the 2nd class swimming standard to prioritize safety on the water.