Badr bin Hamad Al Busaidi told a Manila ministerial meeting that the Strait of Hormuz and other vital waterways must remain open, safe and accessible for international shipping.
UNCLOS is a cornerstone of maritime security and freedom of navigation, he said, arguing that global trade, food security and energy security depend on keeping sea lanes unobstructed.
Ship-tracking data showed traffic through Hormuz had fallen to its lowest level in more than two months as U.S. strikes on Iran intensified and Iran targeted Gulf countries, Jordan and vessels in the strait.
Oman pointed to Malacca-Singapore cooperation as a model and said it would deepen maritime coordination with ASEAN states to support safer regional shipping.