Final answer:
The Medical Officer is responsible for identifying adverse community health conditions for sailors requesting in-rate reenlistment.
Step-by-step explanation:
The individual responsible for identifying adverse community health conditions for sailors requesting in-rate reenlistment is 2) Medical Officer.
The Medical Officer is trained to assess the health conditions of individuals and make medical recommendations based on the findings. They would be the most knowledgeable and equipped to identify any adverse health conditions that may affect a sailor's reenlistment.