The Surgeon

The ship's surgeon tends to injuries, keeps illnesses from spreading throughout the ship, and oversees sanitation. A capable surgeon benefits from a high Intelligence score, as well as proficiency with herbalism kits and the Medicine skill.
While there is no inherent bonus to being the ship's surgeon, they are necessary to aid in specific Hazard Rolls including Fires and Infestations. Having one on board is therefore important as a lack of a surgeon will result in automatic fails for that roll which will add a failure tally to the overall result.