J class
J- Class stands for:
- An airship type of the U.S. military in the 1920s and 30s, see List of military airships of the United States
- J- class ( sailing), a class of boat from the history of the America 's Cup
- Submarine class J ( Royal Navy ), a class of British submarines in the First World War
- J- class ( Royal Navy ), a British destroyer class from the Second World War
- Disambiguation