What does SSZ stand for?

Pocket Submarine (NATG)

Saigon Special Zone - Military

Samos Resources, Inc. - Vancouver Stock Exchange symbol

Santos - Brazil - Airport symbol (AD)

Sea Scout Zero - Nonrigid Airship - Royal Naval Air Service - British

Sengseng - Language code (ETLW)

Society of Systematic Zoology (EA)

Specified Strike Zone - Army (AABC)

Supra-Subduction Zone - Geology