Check with your RM or SBS fellows.....seems to me I seen a movie about some kayakers who raided a French Port and also Singapore Harbor after it was taken over by new management.
"Cockleshell Heroes" and "The Highest Honor" films were based upon those exploits as I recall.
The Italians had some very good luck with them too I am thinking.
Mr. Noriega had to forego leaving home by boat because of those nasty Limpet critters it is said.