20.1 |
Traffic separation scheme (TSS), traffic separated by separation zone |
20.2 |
Traffic separation scheme, traffic separated by natural obstructions |
20.3 |
Traffic separation scheme, with outer separation zone, separating traffic using the scheme from traffic not using it |
21 |
Traffic separation scheme, roundabout with separation zone |
22 |
Traffic separation scheme with "crossing gates" |
23 |
Traffic separation scheme crossing without designated precautionary area |
24 |
Precautionary area |
25.1 |
Inshore traffic zone (ITZ) with defined endlimits |
25.2 |
Inshore traffic zone without defined endlimits |
26.1 |
Recommended direction of traffic flow between traffic separation schemes |
26.2 |
Recommended direction of traffic flow for ships not needing a deep water route |
27.1 |
Deep water route (DW), as part of one-way traffic lane |
27.2 |
Two-way deep water route, with minimum depth stated |
27.3 |
Deep water route, centreline as recommended one-way or two-way track |
28.1 |
Recommended route (often marked by centreline buoys) |
28.2 |
Two-way route with one-way sections |
29.1 |
Area to be avoided (ATBA), around navigational aid |
29.2 |
Area to be avoided (ATBA), because of danger of stranding |
Note: Sections identified in italic numbers are not applicable to the CHS |