Across
- 2. top colour south cardinal
- 3. total number of flashes for SCM
- 5. temporary wreck colour
- 6. type of danger mark on its own
- 8. safe side to pass ECM heading north
- 11. top of a NCM
- 13. direction of stripes on safe water mark
- 14. starboard lateral
- 16. marking a channel
- 17. stripe on preferred channel to port
- 18. cardinal sitting at 90 degrees to a hazard
Down
- 1. marks a swimming area
- 3. navigable channel
- 4. NCM flashes
- 5. middle stripe on east cardinal
- 7. triangles point towards each other
- 9. number of balls on an navigation mark
- 10. top of a north cardinal
- 11. top of a temporary wreck marker
- 12. colour a safe water mark flashes
- 15. middle stripe on west cardinal