CNN PRODUCER NOTE     This iReporter says he and his wife were sitting in the observation deck of the cruse ship on Friday when they heard a loud fog horn. He says they saw a container ship appear out of the fog and braced for a collision. He said the ship shuddered after the impact and that people and things were knocked to the ground.

Silversea issued the following statement:

"Silver Shadow was involved in a minor incident on March 16, 2012 at around 4:20 GMT as it was approaching the pilot station in Ha Long Bay, Vietnam. There was contact between Silver Shadow and a local commercial vessel. Silver Shadow incurred limited minor dents and guests' safety was never compromised. The ship was fully operational and continued on its course to Ha Long Bay where all shore tours operated normally.

"Silversea will carry out a full investigation into the incident."
- davidw, CNN iReport producer