Why Australia hasn't sent ships to the strait

We'll hear from the boss of the United Nations' International Maritime Organisation (IMO) ahead of body holding an extraordinary session to address the escalating crisis in the Gulf.

We'll also get the perspective of a former Iranian Ambassador. 

And hear the latest on the South Australian election with the state opposition, as it faces a challenge from One Nation.

Recap the morning's news, politics and global affairs with the Breakfast Wrap.