France, June 25 -- There is no independent confirmation that Iran has mined the waterway, but maritime authorities have warned of suspected and confirmed mines in the area and vessels have reported seeing floating objects.

Around one-fifth of the world's oil passes through the Strait of Hormuz. Under the US-Iran memorandum of understanding signed on 17 June, Iran is expected to lead any de-mining operation, although France and the United Kingdom have offered to contribute to an international coalition.

While commercial traffic has resumed, it remains well below pre-war levels. The question now is whether shipowners, crews and insurers can be confident the passage is safe.

Lavault explains how naval mines are laid and why clearing the s...