Inaccurate surveys of ocean depths a threat to mega-ships

Inaccurate surveys of ocean depths a threat to mega-ships

When the 3,351-TEU container ship Rena grounded off New Zealand in 2011, the cargo losses totaled $1 billion, and the salvage operation took seven months. The loss pales in comparison to what’s at stake as the latest generation of container ships approach 20,000 20-foot-equivalent units.

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