1) The document outlines the process for Sailors to volunteer for Overseas Contingency Operations Support Assignments (OSA), which involves deploying in support of overseas operations. 2) Eligible Sailors must indicate their interest in an OSA 9-12 months before their scheduled rotation date and meet screening requirements like security clearance and medical checks. 3) Sailors selected for an OSA will receive temporary additional duty orders and have their rotation date adjusted, then return to their parent command for 60 days before executing follow-on permanent change of station orders.