Using Delphi methodology, we created measurement instruments for specific training tasks included in Marine Emergency Duties training. Six Marine and Offshore Safety and Survival instructors rated items important for immersion suit and self-contained breathing apparatus (SCBA) donning tasks. Consensus was reached, and an item was included on the final checklist when at least 80% of the experts rated the importance of the item as greater than or equal to four out of five. After one round of surveys, panelists reduced items from 12 to five for the immersion suit donning task and from 30 to 19 for the SCBA donning task. Delphi methodology allowed for the creation of checklists that can be used to assess trainee competence for two specific tasks. These checklists will aid researchers and educators in measuring performance within a course environment while producing as little interference with the instructional experience as possible.