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Admiralty tugs were tugboats built for and operated by the Royal Navy. These were vessels built to Admiralty specifications and in specific classes during the First and Second World Wars. They were built to meet the Royal Navy's demand for auxiliary vessels and to supplement the civilian tugs requisitioned by the Admiralty for war service.
At the outbreak of the First World War the Royal Navy owned seven fleet tugs, mainly civilian vessels purchased as required, employed in normal tug duties at naval ports. When war commenced the Admiralty put in train plans to requisition civilian tugs to meet the need for vessels to work as patrol vessels, minesweepers, anti-submarine warfare vessels and a host of routine duties. In all, over 100 civilian tugs were requisitioned in this way.
There was an increased need for boats to act on the salvage and rescue of ships attacked and damaged on the high seas, for which the civilian fleet was not sufficient. To meet this need the Admiralty placed an order for 64 sea-going tugs to operate in this capacity. These were to a single design, based on a civilian type, and, as they were built by specialist shipyards, incorporated merchant rather than navy features. However it was specified they be armed and equipped with radio.
The main class of Admiralty tug was the Saint-class (named after British localities beginning with "St", eg St Abbs). Of 64 ordered, 46 were completed and commissioned before the end of hostilities. The second class was the Resolve (also called Rollicker or Hunter, after Sir David Hunter) class, six large ocean-going tugs for duty on the high seas, but these were incomplete at the war's end. Their names were Resolve, Respond, Retort, Rollicker, Roysterer, and Rollcall. [1] [2]
In addition the Admiralty built several classes of small tugs, including 10 Robust-class paddle tugs, and 6 West-class harbour tugs, and several classes of tugs for special duties. 15 vessels were built to tugboat design for use as boarding vessels in the Thames estuary and another 13 for use in the Mersey. They also built 12 tugs (the Crete-class, a further 12 were cancelled) of ferro-concrete construction employed towing ferro-concrete barges between England and France. [3]
| Class | Built | Builder(s) | Tonnage (GRT) /displacement | Dimensions | Engines | Armament | Notes |
|---|---|---|---|---|---|---|---|
| Saint | 1918 | Ferguson, Day Summers, Crabtree, Harland and Wolff | 800t (440 GRT) | 143 ft length x29ft width 12 ft draught | 1250 ihp 12kn | 1x 12-pdr | 46 built 16 cancelled |
| Resolve | 1918/9 | Ferguson, Ayrshire, Day Summers, Thornycroft | 739-842grt 1400 t displacement | 182 ft overall x 34 ft x 15 ft | 2400 ihp 14kn | 1x12pdr | 6 built |
| Class | Built | Tonnage (GRT) | Dimensions | Engines | Armament | Notes |
|---|---|---|---|---|---|---|
| Robust | 1909-1915 | 700t 635 tons displacement | 144 ft (pp) x 27 ft x 11 ft | 2x reciprocating double expansion 1250 ihp | 10 built plus HMT Pert, an enlarged design | |
| West | 1919 | 131-161 tons gross | . 88 ft (pp) x 21ft x 9ft (deep) | Compound 430 ihp 10kn | 11 built, 6 cancelled [4] | |
In World War II a similar situation arose; the Admiralty again requisitioned civilian tugs and placed orders for a range of Admiralty tugs. In all 117 harbour tugs were brought into service, including the ten Robust- and six West-class vessels (built in World War I and now in civilian service) and 101 others of various design. Just two harbour tugs were built for the Admiralty during World War II, the Alligator-class.
Prior to 1939 the Royal Navy had built four Brigand-class rescue tugs for its own use; at the outbreak of World War II a further 74 civilian tugs were requisitioned, including 16 Saint and five Rollicker class of World War I vintage, and 53 others. At the same time orders were placed for 21 Admiralty tugs, the Assurance-class, the first being delivered in 1940. In 1942 a further 23 Favourite-class, and eight Bustler-class tugs were built, followed in 1944 by six Envoy-class tugs. A number of US Rescue Tugs were also supplied under the Lend-Lease programme. These long-range Rescue Tugs were ocean-going ships which often accompanied convoys and operated in all theatres of the war. They were largely crewed by experienced Merchant Seamen recruited into the Royal Navy under T124 articles and formed a specialist unit known as His Majesty's Rescue Tug Service (commanded from HMS Minona moored in Campbeltown in Scotland). These vessels were supplemented by a number of similar vessels owned by the Ministry of War Transport (MoWT) and operated on their behalf by private shipping companies (notably the United Towing Company based in Hull). Most of the RN and MoWT Rescue Tugs were disposed of at the war's end. [5] )
| Class | Built | Tonnage (GRT) | Dimensions | Engines | Armament | Notes |
|---|---|---|---|---|---|---|
| Saint | 1918 | 800t | 1250 hp 12kn | 1x12pdr | 18 in service 9 lost | |
| Rollicker | 1919 | 1400t | 2400 hp 14kn | 1x12pdr | 5 in service no losses | |
| Brigand | 1938 | 840t | 3000 hp 15.5kn | 1x3in gun 1x20mm 2xMG | 4 built 1 lost | |
| Assurance | 1940 | 700t | 1350 hp 14kn | 1x3in 2x20mm 2xMG | 21 built 5 lost | |
| Favourite | 1942 | 783t | 1875 hp 14kn | 1x3in 2x20mm | 23 built 1 lost | |
| Bustler | 1942 | 1118t | 3200 hp 16kn | 1x3in 1x2pdr 2x20mm 4xMG | 8 built 1 lost | |
| Envoy | 1944 | 868t | 1700hp 12kn | 1x3in 2x20mm 2xMG | 6 built no losses | |
| Class | Built | Tonnage (GRT) | Dimensions | Engines | Armament | Notes |
|---|---|---|---|---|---|---|
| Robust | 1909 | 700t | 1250 hp 12kn | ? | 10 in service 1 lost | |
| West | 1919 | 161t | 430 hp 10kn | ? | 6 in service 2 lost | |
| Alligator | 1941 | 395t | 1000 hp 12kn | 1x12pdr | 2 built 1 lost | |
The Royal Naval tugs and small auxiliaries were formed by the Royal Maritime Auxiliary Service and crewed by MoD employed civilians. However this was outsourced to a private company Serco-Denholm slightly prior to the year 2000. Initially the vessels were still MoD owned but the crews and manning were privatised. The remaining vessels were later sold to Serco-Denholm changing from the old black and buff colour scheme of the RMAS to black and white. All the vessels now carry the initials SD prior to their name.
Admiralty tugs were built to Navy specifications, and standardized where possible to a single design, though this was based on a civilian type. In this they followed the pattern of other auxiliary vessels, such as the Admiralty trawlers, and the Flower-class corvettes. They were built by shipyards specializing in tug construction, and thus incorporated merchant rather than navy features, such as an enclosed bridge, and wooden superstructure. However, it was specified they be armed and equipped with radio. The First World War vessels had at least one gun, for self-defence, and smoke-generating gear. [1] In World War II they also carried anti-aircraft guns for protection against air attack.
One of the builders of these tugs was Henry Robb Ltd. Below is a list of Bustler-class ocean rescue/salvage tugs built during World War II. These were powered by diesel engines.
Built and launched in 1941 to 1942 were:
Built in 1944 and 1945 were:
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