Some divers have criticised us for doing this, claiming that the wrecks aren't technically difficult enough. We don't agree safety is everything. The clean-up operation is also extremely important. Over the past three sinkings there has been no evidence of any surface sheen from pollutants. We always work very closely with environmental agencies to make sure we're getting it right.
Marine life is quick to take up residence in the wrecks.
The HMCS Saskatchewan had been on the sea bed for just 10 months when we visited her. Already there were shoals of fish inside the bridge and gun compartments. Sponges were starting to grow on the outer hull, masking her original camouflage. Her sister ship, the HMCS Columbia, has been under water for almost two years. Diving her after the Saskatchewan was like stepping forward in time.