The vacationer boat concerned within the accident at Horizontal Falls in Western Australia final week "didn't capsize", in keeping with the Australian Maritime Security Authority (AMSA).
The discovering got here after the federal government authority inspected the vessel concerned and the scene of the accident, as part of an ongoing multi-agency investigation.
"At this stage of the investigation, AMSA can verify that the vessel didn't capsize, no folks fell within the water and seems to have collided with a rock wall," a spokesperon mentioned.
As part of the investigation, the authority additionally interviewed the tourism operator's firm personnel on-site.
Twenty-six vacationers and two crew members had been on board the vessel through the incident at 7am on Friday.
A number of folks had been left with severe accidents which required surgical procedure, medics say.
Police claimed at a press convention on Friday that "numerous folks did discover themselves within the water".
Officers additionally recommended the efforts of tour operators to get sufferers again to pontoons.
Nonetheless, in a press release, the operator Horizontal Falls Seaplane Adventures mentioned the boat didn't capsize and instantly returned to the pontoon.
AMSA mentioned it has issued a prohibition discover to the home business vessel and a path discover to stop the operator utilizing another vessel to transit the Horizontal Falls pending the result of the investigation.
"AMSA has additionally issued an emergency suspension of the grasp's Certificates of Competency," a spokesperson mentioned.
The spokesperson mentioned "because the investigation is ongoing no extra particulars might be disclosed presently".
"The findings of the investigation might be launched in the end," they mentioned.