to allow water to come out and to ventilate. It would be the best to leave it as it is for couple of months, maybe until october.
Terezas hull is made as sandwich all the way down to keel, as illustrated above.
Sandwich means two layers of fiberglass and foam (yellow) between. The big red arrow is damage from coral. Other arrows were being drilled by me.
You will understand better about it with next video:
And by the way there is also other damage on the Tereza which about I did wrote already before. And abut me: I do not know.