Thanks to George W. Young for sending this image. Charlie Rice, who has contributed other old images seen on this site, says: "I just discovered that the PT-boat picture on the same page that you posted my downtown/Bayfront Park photo shows the Navy's "PT-boat Shakedown Detail" commanded by Guadalcanal veteran Lieutenant Commander Alan R. Montgomery. It was established in April 1943 to shake down the PT-boats manufactured by the Higgins and Elco companies. I thought you might like this information." Thanks, Charlie!
Charlie also says: "The SCTC commandant was Commander Eugene Field McDaniel, an Annapolis graduate who had served aboard the destroyer Livermore on anti-submarine duty in the North Atlantic before his transfer to Miami."
A British film about "America's Mosquito Navy" at Miami is at: http://www.britishpathe.com/record.php?id=12532