High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! HMS G4 was a British G class submarine of the Royal Navy from World War I. Like the rest of her class, G4's role was to patrol the North Sea in search of German U-boats. The Royal Navy's G-class of diesel/electric submarines were launched between 1914 and 1917, and intended for operations in the North Sea and German Bight in World War I against German U-boats. The design was based on the E-class, adopting the double hull concept, but in practice showed little improvement, the ships notoriously slow to dive.

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