On 10/10/1999, the vessel MAMMIE (Official Number 123456) was involved in a grounding - under power (non-intentional) in DUNKS BAY SHOAL, GEORGIAN BAY,.

The vessel, with 1 persons on board, experienced the incident while engaged in regular operations. There were 0 injuries and fatalities were reported, and there was none pollution.

The dive boat Mammie ran aground near Dunks Bay Shoal, Georgian Bay, in darkness and rough weather with 12 persons aboard. Refloated with assistance from another P/C.. Damage to the vessel was indicated as MINOR

Weather at the time was reported as unknown with winds from the W at 20.00 knots. This incident was officially recorded by Transport Canada on 10/12/1999.