A useful passage at the SW end of Lac St Pierre. Leave the main channel just north of buoy S114 and enter the channel that passes between Ile Plate and Ile de Grace taking care to avoid the 0.3m drying patch marked on the chart. Anchor midway between the southern shore of Ile Plate and the drying bank of La Grande Pointe in 5-6 m of water. The anchorage is sheltered from the main St Lawrence current and holding is good in sand/mud.