Glossary
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Before the actual recovery of the P.S. Lady Sherbrooke was undertaken a series of core samples were taken from the site. This was done by drilling, or coring, the area where it was believed that the vessel rested.

A sample, called a carrot, from each of the areas drilled provided an indication of the density and type of materials covering the wreck. This information was then used to estimate the task in front of the divers when they cleaned area around the wreck.

For example, several metres of very heavy mud would require more cleaning than an area with only a few centimetres of a fine silt covering it. In addition to the coring done underwater a series of samples were done on the land nearby.