It has been conducted by the United States Navy since 2015.
It is a biennial coordinated multilateral anti-submarine warfare (ASW) exercise.
P8I aircraft of the Indian Navy were sent to Guam, USA to participate in the 3rd edition of this exercise.
India, the USA, Japan, Canada, and South Korea are the participating countries.
Other exercises between India and USA are: Malabar, Yudh Abhyas, and VAJRA PRAHAR.