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| Transitway | 58 | Transitway is the broadest class of regions which may be passed through as a path in instances ... | ^ |
| WaterArea | 106 | A body which is made up predominantly of water, e.g. rivers, lakes, oceans, etc. | ^ |
| Waterway | 11 | Waterway is the class of navigable waters, including Oceans, SeaLanes, Rivers, Canals, ... | ^ |
| ShippingLane | . | | ^ |
| ShippingChannel | . | | ^ |
| SeaLane | . | | ^ |
| Channel | . | A Channel is a narrow deep waterway connecting two larger bodies of water. May be natural or dred... | ^ |
| CanalLock | . | | ^ |
| Harbor | 1 | Harbor is the subclass of WaterAreas that provide shelter and anchorage for WaterVehicle. | ^ |
| WaterJunction | . | WaterJunction is the subclass of TransitwayJunctions where two or more Waterways come togethe... | ^ |
| Canal | . | Canal is the subclass of navigable Waterways flowing through an artificial course. Typically, a... | ^ |
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