Marep Report by Cdr Bill Cloutier
Canadian Hydrographic Service, together with the Canadian Coast Guard,
held a meeting on June 21 at the Royal St-Lawrence Yacht Club to report
on their recent survey of Lake St-Louis and to propose a number of
changes to the buoys on the lake. They
immediately got everyone’s attention by informing us that the Chart
Datum used to show the water levels on Chart 1410 is wrong and that the
true datum level of Lake St-Louis is almost a foot lower, meaning that
the rocks are really about a foot closer to the surface than shown on
the chart. They will
correct this error when Chart 1410 is reissued next year.
the result of complaints from pleasure craft operators, including the
large tour boats that use the lake, concerning the large number of rocks
in or near channels that are not indicated on the current chart, the
Hydrographic Service undertook a survey of the lake from Lachine to
Ste-Anne de Bellevue.
Much of the presentation was devoted to the “Dixie Route”, the area
between the Royal St-Lawrence Yacht Club and the Seaway, and a number of
alternatives were presented including the use of a sector light to mark
the channel from the Seaway towards Lachine.
Due to the large number of obstacles near the channels in this
area, the narrowness of the channels at certain points, and the large
number of lighted buoys required to mark the safe passage, the solutions
are not apparent.
in buoy placement are also proposed for the Lachine and Valois channels
number of changes to the buoys between Dorval and Dowker Island were
proposed, including the use of larger lighted buoys, to avoid obstacles
and to provide better visibility of the buoys.
Lynch Channel (between Dowker Island and Baie d’Urfé) to the Brucy
Dike (near Ste-Anne de Bellevue) it is proposed that many of the buoys
be repositioned to keep boats away from rocks and other obstacles. Additional buoys will be placed near the southern entrance to
the cut in Brucy Dike to mark obstacles that make the channel quite
narrow at that point.
are also proposed to the buoys marking the channel that rounds Windmill
Point, leading to the Seaway to make the channel safer. It is proposed the entrance to the channel when coming from
La Passe (the channel between Dowker Island and Île Perrot) be marked
with a larger buoy that will be
easier to spot.
of the proposed changes were circulated to the participants (as a
PowerPoint document) and comments and suggestions were requested from
pleasure craft operators in the area before the
final changes are made to the chart.
The Wheelhouse, July 2001, Volume 2, Issue 2 & 3