Carrier in the Crosshairs

Story and photo from the Canadian Maple Leaf:

This recently unclassified photo was taken as the result of
manoeuvres during Exercise NOBLE MARINER in May where HMCS Corner Brook was able
to approach a high value unit, in this case the British aircraft carrier HMS
Illustrious, without being detected. Anti-submarine warfare continues to be one
of the most under-estimated and difficult threats for allies and potential
adversaries to deal with.

Submariners say there are 2 types of vessels, Submarines and Targets!

H/T to Free Republic.