### **Oral Flashcard for ROR (Rules of the Road)**
**Question:** What is the purpose of ROR?
**Answer:** To prevent collisions by defining navigation rules for vessels.
**Question:** What are the two main types of vessels in a crossing situation?
**Answer:** Stand-on vessel (maintains course) and give-way vessel (alters course).
**Question:** What light configuration does a power-driven vessel display at night?
**Answer:** Masthead light(s), sidelights (red/green), and a sternlight.
**Question:** What does a single prolonged blast indicate?
**Answer:** A vessel is leaving a dock or underway.