Glass Bottom Boat / Semi Submarine.

On a glass bottom boat, you look down through specially designed viewing panels in the floor. A semi-submarine takes you below the waterline, where you look through large windows for a more immersive, diver-like view of the reef.

No. These tours tours are completely dry activities, making them ideal for non-swimmers, children, elderly visitors and anyone who would rather not enter the water.

The usual glass bottom boat or semi-submarine experience is generally around 30 minutes, although the overall experience will depend on the reef or island tour you have booked.

They can be, although some vessels require passengers to negotiate steps when boarding. Visitors with mobility concerns should check the specific vessel's access arrangements before booking.

Yes, photography is generally permitted, although reflections through glass and underwater viewing windows can make photography challenging. Following crew instructions is important.

Both provide an easy way to experience the reef without swimming. A glass bottom boat offers a traditional view looking down through the floor, while a semi-submarine gives you a more immersive, below-waterline perspective through its windows.