Image of Musson and Passat off Newfoundland

As related here, the ships Passat and Musson were research vessels used by the Soviet Union to find suitable locations for hiding nuclear submarines on the Atlantic margin of North America.

Musson about to enter St. John's harbour in late June, 1986. The main thing

I remember is that they refused to allow the harbour pilot aboard.

Stern view of the Passat in St. John's harbour in early June 1986.