Know Your ATONS

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Across
  1. 5. We mark the safe edges of a channel
  2. 7. White + orange with black text near a circle, square or diamond
  3. 9. shape of an even numbered beacon
  4. 11. Pair of dayboards that keep you on a straight safe course in a channel
  5. 12. Always red with an even number
Down
  1. 1. I'm not an aid to navigation but you like to stay with me.
  2. 2. When returning from open water, I keep the red buoys on this side
  3. 3. a beacon without a light
  4. 4. Horizontal red and black band with two black balls
  5. 6. Safe water buoy, red + white w 1 red ball sounds this Morse Code letter
  6. 8. Both red and green horizontal bands to mark a junction of navigable channels
  7. 10. There are two types of navigation aids. One is a buoy. I am the other