Scott surmises:
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I suspect that Canada has much the same structure as the US, since
English common law is the genesis for both. Thus, there is probably
some distinction drawn between navigable and non navigable.
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From: http://www.lwbc.bc.ca/04community/en.../trespass.html

TREPASS ON WATERFRONT PROPERTY

Owners of shoreline property in British Columbia should be aware that
most aquatic land is owned by the province and managed by Land and
Water British Columbia Inc.

Aquatic land is defined as follows:

* Aquatic Crown land is land below the high water mark. It extends
offshore to the end of provincial jurisdiction.
* Foreshore is the land between the high and low water marks of
lakes, streams and ocean.

Waterfront property owners do not have an automatic right to develop
the foreshore in front of their privately owned land.

Unauthorized use of this land is trespassing and therefore subject to
trespass provisions under the Land Act, including administrative
penalties and fines.

++++There is no mention of "navigable"

frtzw906