S73
S73 may refer to:
Aircraft[edit]
- Bernard S-73, a French racing monoplane
- Savoia-Marchetti S.73, an Italian airliner
- Sikorsky S-73, an American helicopter proposal
Submarines[edit]
- HMCS Onondaga (S73), of the Royal Canadian Navy
- INS Arihant (S73), of the Indian Navy
- INS Rachav (S73), of the Israeli Navy
Other uses[edit]
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