Not sub secrets, but silent and strange ever since...

The articles linked below (by dates) provide more details than the excerpts provided below; you are urged to read them. 
 

# 1

Security scare shuts Kings Bay  (May 22, 2004)

excerpts [color and underscoring emphasis mine]...

ST. MARYS, Ga. -- Kings Bay Naval Submarine Base was locked down for security reasons Friday after two Israelis were detained for questioning. Base spokesman Ed Buczek said two Israeli men attempted to enter the base about 10:30 a.m. They were hired by a moving-and-storage company to pick up some household goods in base housing, he said.

"The military dogs were alerted to a scent in the cab of the truck," Buczek said. "Guards closed access to the base and notified the Georgia Bureau of Investigation, the Federal Bureau of Investigation and the Naval Criminal Investigative Service."

The two men, whose names were not released, were detained and later taken into custody by federal immigration officers in Savannah for possible deportation, Buczek said.

Hat Tip:  Al-Jazeerah  News & Views, December 2013

related:  The Palatka Connection 

# 2

Secrets of Kent's WW1 German u-boat   (20 December 2013)

excerpts [color and underscoring emphasis mine]...

For almost a century it has been rusting in obscurity on a remote part of the Kent marshes.

Now, following an investigation by experts for English Heritage, the hull of a First World War German submarine has finally given up its secrets. 

It was previously thought to be one of either U122, U123 or UB 122, but following the investigation, the team believe they can discount the first two, which were minelayers, because they would have been larger in size.

The vessel had been one of the most advanced submarines of the German fleet, being launched in February 1918, at a yard in Bremen. It was a Type UB III, coastal patrol submarine and would have carried 10 torpedoes, with a crew of 34 and a cruising range of 7,200-9,000 miles.  

Mark Dunkley a marine archaeologist with EH said: “For most people, u-boats are out of sight.

"At the start of the war, submarines were supposed to abide by international rules, under which they were supposed to allow the crews of merchant ships to get to safety before sinking their vessels. But this swiftly became impractical and led to the adoption of unrestricted submarine warfare by Germany, which, nearly brought Britain to its knees in 1917. During the course of the war, German U-boats sank more than 12 million tons of shipping - around 5,000 ships - with the loss of 178 submarines and almost 5,000 men killed."

Submarines are always silent and strange.