USS Burrfish had a remarkable career, which can be divided into three main phases.
First phase: Operations against the Japanese in World War II. (designated SS-312).
Second phase: Conversion to and operations as a radar picket submarine (SSR-312).
Third phase: On loan to the Royal Canadian Navy as HMCS Grilse (SS-71).
Here is a photo of Burrfish under way during the second phase of her life. She has been converted to carry early warning radar in order to serve as a radar picket for large warships such as aircraft carriers. In that role she served extensively in east-coast American areas, the Baltic, and the Mediterranean on three extended assignments. She had been fitted with her radar equipment and operated with it from 1950 to 1956, when she decommissioned.
Next up on my series about the Burrfish: her distinguished wartime service.