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The Insect-class gunboats (or large China gunboats[Note 1]) were a class of small, but well-armed Royal Navy ships designed for use in shallow rivers or inshore. They were intended for use on the Danube against Austria-Hungary (the China name was to disguise their function). The first four ships—Gnat, Mantis, Moth and Tarantula—were first employed during the World War I Mesopotamian Campaign on the Euphrates and Tigris rivers.

Design

The ships were designed by Yarrow to operate in shallow, fast-flowing rivers, with a shallow draught and a good turn of speed to counter river flow. They were fitted with two reciprocating (VTE) engines operating two propeller shafts to offer some redundancy. The propellers were housed in tunnels to minimise the operating draught. The main armament consisted of two 6 inch guns in single mountings fore and aft.

Deployment

Aphis, Bee, Ladybird and Scarab were deployed to Port Said, Egypt in 1915-16, Gnat, Mantis, Moth and Tarantula were sent to the Persian Gulf in 1916. Glowworm, Cicala, Cockchafer and Cricket were deployed to the east coast of England in 1916 and had their main armament mountings modified to give higher elevation for anti-Zeppelin work.

In 1919, during the Russian Civil War, Glowworm, Cicala, Cockchafer, Cricket, Moth, and Mantis served on the Dvina River (northern Russia, in Arkhangelsk Oblast), fighting in support of White Russian forces. Glowworm's captain and some other crew members were killed when a nearby ammunition barge exploded. The crew of Cicala mutinied, as part of a wider wave of unrest in the Royal Navy, and five "ringleaders" were sentenced to death, later commuted to five years' imprisonment.

Between the two world wars, the class were mainly used in the Far East and they were present during the Japanese invasion of China. In 1937, on the Yangtze river, the Japanese attacked Ladybird, firing on her from a shore battery. A US gunboat, USS Panay was also attacked, by Japanese aircraft, and sunk. Ladybird sailed the 20 miles to the scene of the sinking, took on board some of the Panay survivors and took them to Shanghai. Scarab and Cricket were off Nanking in 1937 as the Japanese started to bomb the city.

In 1939, the original two 6 inch Mk VII 45-calibre guns on Aphis and Ladybird were replaced by more modern and 30 inch longer 6-inch Mk XIII 50-calibre guns from the decommissioned battleship Agincourt.

At the start of World War II, three vessels, Cricket, Gnat, and Ladybird, were transferred to the Mediterranean Fleet's Inshore Squadron. They joined the monitor Terror and provided bombardment support for the 8th Army. Their shallow draught allowed them to act also as supply and landing vessels, able to get close-in to beaches.

In June 1943, Aphis took part in the bombardment of Pantelleria (Operation Corkscrew).

Ships

Notes

  1. ^ The Fly-class gunboats were "small China gunboats"

References

  1. ^ Gardiner, Robert; Gray, Randal, eds. (1984). Conway's All the World's Fighting Ships: 1906–1922. Annapolis: Naval Institute Press. p. 405. ISBN 0-87021-907-3. OCLC 12119866. 

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