H31 may refer to: Hanriot H.31, a French biplane fighter aircraft , a Royal Navy G-class destroyer later transferred to the Royal Canadian Navy and renamed HMCS Ottawa (H31) , a Royal Navy H class submarine
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Encyclopedic overview
H31 may refer to: Hanriot H.31, a French biplane fighter aircraft , a Royal Navy G-class destroyer later transferred to the Royal Canadian Navy and renamed HMCS Ottawa (H31) , a Royal Navy H class submarine
Excerpted from Wikipedia’s “H31” article, available under the CC BY-SA 4.0 licence.