Refers to bodies of water or water routes that are deep and wide enough for ships to travel. Ships avoid the shallows, sticking to the navigable parts of the sea.
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Size Matters
Larger ships require larger waterways, so 'navigable' can depend on the size and type of vessel. While the river is navigable, it may not accommodate large freighters.
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Seasonal Changes
Some waterways are only navigable during certain times of the year due to weather or water levels. The channel is navigable when the summer tides come in.