| 1 | Traffic separation scheme; traffic separated by separation zone |
| 2 | Traffic separation scheme, traffic separated by natural obstructions |
| 3 | Traffic separation scheme with outer separation zone (separating traffic using scheme from traffic not using it) |
| 4 | Traffic separation scheme, roundabout |
| 5 | Traffic separation scheme, with "crossing gates" |
| 6 | Traffic separation schemes crossing, without designated precautionary area |
| 7 | Precautionary area |
| 8 | Inshore traffic zone, with defined end-limits |
| 9 | Inshore traffic zone without defined end-limits |
| 10 | Recommended direction of traffic flow, between Traffic separation schemes |
| 11 | Recommended direction of traffic flow, for ships not needed a deep water route |
| 12 | Deep water route, as part of one-way traffic lane |
| 13 | Two-way deep water route, with minimum depth stated |
| 14 | Deep water route, centerline as recommended. One-way or two-way track. |
| 15 | Recommended route (often marked by centerline buoys) |
| 16 | Two-way route with one-way sections |
| 17 | Area to be avoided, around navigational aid |
| 18 | Area to be avoided, because of danger of stranding |