All vessel operations from Bournemouth Pier person been suspended "as a precaution" pursuing the deaths of a miss and a teenage boy.
Joe Abbess, 17, from Southampton, and 12-year-old Sunnah Khan, from Buckinghamshire, some died successful infirmary aft an incidental past Wednesday.
An inquest heard a "suggestion" a riptide led to the brace drowning.
The assembly said the prohibition connected vessel operations would stay pending the result of a constabulary investigation.
Dorset Police has said it was keeping an "open mind" astir the circumstances that led to the deaths and dismissed speculation the brace had jumped from the pier.
The unit said it was considering causes including the interaction of upwind conditions and the authorities of the water.