10 |
 |
Rock (islet) which does not cover, height above the plane of reference for elevations |
 |
11 |
 |
Rock which covers and uncovers, with height known or unknown above chart datum |
 |
12 |
 |
Rock awash at chart datum |
 |
13 |
 |
Underwater rock of unknown depth, dangerous to surface navigation |
 |
14 |
 |
Underwater rock of known depth |
 |
14.1 |
- inside the corresponding depth area |
14.2 |
 |
- outside the corresponding depth area, dangerous to surface navigation |
 |
15 |
 |
Underwater rock of known depth, not dangerous to surface navigation |
 |
16 |
 |
Submerged coral reef |
 |
17 |
 |
Breakers |
 |