| Definition | Symbol |
| Maritime limit in general, usually implying PERMANENT physical obstructions | |
| Maritime limit in general, usually implying NO PERMANENT physical obstructions | |
| Limit of restricted area | |
| Limit of area into which entry is prohibited | |
| Reported anchorage (no defined limits) | |
| Anchor berths with swinging circle shown | |
| Anchorage area | |
| Seaplane operating area | |
| Anchorage for seaplanes | |
| Anchoring prohibited | |
| Fishing prohibited | |
| Environmentally Sensitive Sea Areas: Limit of marine reserve, national park, non-specific nature reserve | |
| Historic wreck and restricted area | |
| Maximum speed | |
| Seabed operations dangerous/prohibited | |
| Diving prohibited | |
| Firing practice area | |
| Mine-laying (and counter-measure) practice area | |
| Straight territorial sea baseline with base point | |
| Seaward limit of Territorial Sea | |
| Seaward limit of Contiguous Zone | |
| National fishery limits | |
| Limit of Exclusive Economic Zone | |
| Customs limit | |
| Limit of fast ice, Ice front | |
| Floating barrier, including log ponds, security barriers, ice booms, shark nets | |
| Flood tide stream (with mean spring rate) | |
| Ebb tide stream (with mean spring rate) | |
| Ocean current | |
| Current in restricted waters | |
| Overfalls, tide rips, races | |
| Eddies |
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