What can be said about naval guns used on land and in tanks during the First World War?
Short answerNaval artillery could serve ashore, while tanks mainly borrowed quick-firing mechanisms and gun ideas adapted to much smaller vehicle constraints.
NotesNaval weapons could be used ashore as heavy artillery, but a tank installation faced very different limits. Armies were especially interested in quick-firing breech mechanisms for vehicle guns. The tank gun could be much shorter than the shipboard gun with which it was being compared. Borrowing a mechanism did not mean fitting a complete naval gun to a tank.