Operation Hats, 30 August-5 September 1940

Operation Hats (30 August-5 September 1940) was one of a series of complex operations carried out by the Royal Navy after the entry of Italy into the Second World War effectively split the British Mediterranean fleet in two. Operation Hats had several objectives. First, Admiral Andrew Cunningham’s fleet in the eastern Mediterranean was to be reinforced by the new carrier Illustrious, the modernised battleship Valiant and the anti-aircraft cruisers Coventry and Calcutta. Second, supplies were to be run to Malta. Third, both Force H and the Mediterranean fleet were to attack a variety of Italian targets in passing, amongst them Cagliari and Rhodes. Churchill had also hoped to take this chance to move a number of infantry tanks to Egypt, but this idea was strongly opposed by all relevant naval authorities and gained no support from General Wavell in Egypt, and as a result was abandoned (later in the year merchant ships were safely passed through the Mediterranean as part of Operation Collar, suggesting that the Admiralty had dramatically overestimated the danger from Italian air power, just as they had dramatically underestimated it before the war). The operation began on 30 August, when Somerville left Gibraltar and Cunningham left Alexandria

Somerville left Gibraltar at the head of the largest British fleet to enter the Mediterranean since the start of the war. Force H provided the carrier Ark Royal, the battlecruiser Renown the cruiser Sheffield, and seven destroyers, supported by the four modern ships heading for Alexandria and by another ten destroyers from Gibraltar. The first contact with the enemy came on 31 August, when Skuas from the Ark Royal destroyed two Italian floatplanes. At 21.50 on 31 August the destroyers Velox and Wishart were sent off to the north east in an attempt to convince the Italians that Somerville was heading for Genoa (Operation Squawk). The main fleet then turned to the south east, heading towards Cagliari. At 03.25 on 1 September nine Swordfish flew off the Ark Royal from a position 115 miles from Cagliari. The attack went in at 06.00 and the Swordfish had returned to the carrier by 08.00. Somerville then made a second change of direction, this time to the south west in an attempt to convince the Italians he was heading back to Gibraltar. This deception measure apparently had no effect, as the Italians were not then shadowing the fleet.

At 10.30 Somerville turned back onto his eastward course, heading for the Sicilian Narrows. At 22.00 on 1 September, half way between the south-eastern tip of Sardinia and the western tip of Sicily the force split in two. Force H turned to the north, in preparation for a second attack on Cagliari (made early on 2 September, this attack was foiled by haze and low cloud), while Cunningham’s reinforcements (now Force F), continued on to the south east, heading for Malta and the Mediterranean Fleet. Somerville’s force returned safely to Gibraltar early on 3 September.

Cunningham left Alexandria with the battleships Warspite and Malaya, the carrier Eagle, the cruisers Sydney and Orion and nine destroyers. This fleet was sighted at 14.30 by an Italian Cant Z 510, which was soon shot down, but a second aircraft was later heard overhead and escaped intact.

On 31 August, when off the southern coast of Greece, Cunningham was joined by Admiral Tovey and the 3rd Cruiser Squadron (Kent, Gloucester and Liverpool). On the same day, a convoy of three merchant ships with a destroyer escort, heading for Malta, was attacked by Italian aircraft and one of the merchant ships became the only British ship to suffer serious damage during the operations (although the ship successfully reached Malta). At roughly the same time one of the Eagle’s aircraft discovered an Italian battle fleet, consisting of two battleships and seven cruisers, 180 miles from Cunningham’s current position. Cunningham’s natural instinct was to head for the Italian fleet in the hope of provoking a battle, but on the next day the Italian ships were sighted heading for Taranto and home.

At 08.00 on 2 September Cunningham’s fleet sighted the Valiant, and the two halves of the operation finally came together. Valiant, Coventry and Calcutta were all carrying supplies for Malta, and so while the main Mediterranean fleet waited 35 miles south of Malta those three ships sailed into the Grand Harbour. Amongst the supplies they were carrying were eight 3.7in anti-aircraft guns, predictors and height finders to support the AA guns, replacement gun barrels, 10,000 rounds of Bofors ammunition, 100 Bren guns, and the post. Two air raids hit Malta while the ships were unloading, but by 19.00 the three warships were able to leave Malta.

Rather than return directly to Egypt, Cunningham decided to attack the Italian airfields on Rhodes. At this date the Aegean was still relatively safe for British ships, and so the fleet was able to sail north of Crete, collecting a convoy on the way. Early on 4 September Swordfish from the Illustrious, acting as dive bombers, attacked the Italian airfields at Maritiza and Callato, while HMAS Sydney bombarded Scarpanto. The operation finally ended on 5 September when the Mediterranean Fleet reached Alexandria. Operation Hats was one of a number of occasions during 1940 when the presence of a British aircraft carrier convinced a potentially strong Italian fleet not to risk combat, and played a part in reducing the effectiveness of the otherwise powerful Italian fleet.

WWII Home Page | WWII Subject Index | WWII Books | WWII Links | Day by Day

Bookmark this page: Bookmark with Delicious  Delicious  Bookmark with Facebook  Facebook   Bookmark with StumbleUpon  StumbleUpon

How to cite this article: Rickard, J (17 July 2008), Operation Hats, 30 August-5 September 1940 , http://www.historyofwar.org/articles/operation_hats.html

Help - F.A.Q. - Contact Us - Search - Recent - About Us -  Subscribe in a reader - Join our Google Group - Cookies