For the same reason they are in no other ocean, there is no requirement for them.
they put up buoys in the indian ocean to detect future tsunamis
Floating markers in the ocean are called buoys.
Yes they do.
The Indian Ocean
The Indian Ocean borders Kenya to the southeast.
When sailing the ocean blue, buoys are an invaluable tool. They assist in navigation by directing ships into shipping channels and away from shoals or crowds.
The Indian Ocean Indian Ocean IT'S THE INDIAN OCEAN!
No, no it is not next to the indian ocean
The Indian ocean lies to the east of Africa,
Atlantic Ocean and Indian Ocean from West Africa, from the East only the Indian Ocean.
Indian ocean
The Indian ocean is the warmest ocean