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Saint Lawrence River Secrets

From Portneuf to the Îles de la Madeleine

This book is available for download with Apple Books on your Mac or iOS device. Multi-touch books can be read with Apple Books on your Mac or iOS device. Books with interactive features may work best on an iOS device. Apple Books on your Mac requires OS X 10.9 or later.


This manual was designed for the purpose of safety and training for all users of the St. Lawrence River. This river, the longest inland navigable waterway in the world, is fascinating in more than one point but can reserve several surprises for navigators eager to discover it.

You will find a directory of 142 sites that can be dangerous when winds interfere with coastal topography. This inventory was conducted using information collected from river users such as fishermen, sailors and boaters not to mention the expertise of scientists and representatives of the Canadian Coast Guard.

This information is presented on simplified topographic charts over which are superimposed the data from the wind, waves, current and topography.

The listed effects in this manual are exactly those described in the Wizvox Media Marine Weather Guide such as:
• the effects of topography, on the direction and speed of winds
• the effects of wind, on wave height and the sea behavior
• the effects of shoals and currents on the behavior of waves.

This directory is complementary to essential guides for safe navigation:
• Sailing rules (various suppliers)
• Charts (Canadian Hydrographic Service)
• Tables of currents and tides (Fisheries and Oceans Canada)

Pssst ...! The assessments about the difficulties of navigation in this manual, refer to vessels under 14 meters.

Distances and depths are in nautical miles, in meters and fathoms in order to match with the types of measurements which appear on the Canadian Hydrographic Service Marine Charts.


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Saint Lawrence River  Secrets
View in iTunes
  • $7.99
  • Available on iPad, iPhone and Mac.
  • Category: Canada
  • Published: Dec 09, 2016
  • Publisher: WizVox Médias
  • Seller: wizgo solutions inc
  • Print Length: 168 Pages
  • Language: English
  • Version: 1.0
  • Requirements: This book can only be viewed on an iOS device with Apple Books on iOS 12 or later, or an iPad with iBooks 2 or later and iOS 5 or later, an iPhone with iOS 8.4 or later, or a Mac with OS X 10.9 or later.

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