fueling the vessel select the correct time to do the following sniff all compartments for fuel odors. before…

Brief Explanations:

Checking for fuel odors before fueling helps detect any pre - existing leaks or issues. During fueling, the focus is on the fueling process itself, and after fueling, the main checks are usually for proper fueling completion and post - fueling system integrity. Sniffing for odors before is the most appropriate time to detect potential problems related to fuel storage areas.

Answer:

BEFORE