NAVYPEDIA

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Alarm

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Jason	N18		Naval Construction & Armament, Barrow	7.9.1891	14.5.1892	6.1893	minesweeper 1909, sunk 7.4.1917
Circe	D81, N81, N26		Sheerness DYd	11.1.1890	14.6.1892	5.1893	minesweeper 1909, sold 7.1920
Hebe			Sheerness DYd	11.1.1890	15.6.1892	10.1894	minesweeper 1909, submarine tender 5.1910
Onyx		585	Laird, Birkenhead	8.10.1891	7.9.1892	1.1894	submarine tender 1907
Leda	N28, N69		Sheerness DYd	25.6.1891	13.9.1892	11.1893	minesweeper 1909, sold 7.1920
Alarm			Sheerness DYd	25.6.1891	13.9.1892	3.1894	sold 1907
Jaseur			Naval Construction & Armament, Barrow	14.9.1891	24.9.1892	7.1893	sold 7.1905
Renard		586	Laird, Birkenhead	26.10.1891	6.12.1892	1.1894	sold 4.1905
Niger			Naval Construction & Armament, Barrow	17.9.1891	17.12.1892	4.1893	minesweeper 1909, sunk 11.11.1914
Speedy		810	Thornycroft, Chiswick	4.1.1892	18.5.1893	2.1894	minesweeper 1909, sunk 3.9.1914
Antelope			Devonport DYd	21.10.1889	12.7.1893	5.1894	submarine tender 6.1910

Technical data

Displacement normal, t	810
Displacement full, t
Length, m	70.1 pp
Breadth, m	8.23
Draught, m	3.66
No of shafts	2
Machinery	2 3-cyl VTE, 4 locomotive boilers Speedy: 2 3-cyl VTE, Thornycroft small-tube boilers
Power, h. p.	forced draught: 3500 Speedy: forced draught: 5000
Max speed, kts	forced draught: 18.7 Speedy: forced draught: 20.5
Fuel, t	coal 100 - 160
Endurance, nm(kts)	2500(10)
Armament	Jason, Onyx, Niger, Jaseur, Speedy: 2 x 1 - 120/40 QF Mk I/II/III/IV, 4 x 1 - 47/40 3pdr Hotchkiss Mk I, 1 x 5 - 11.4/70, 1 - 356 TT (bow, aw), 2 x 1 - 356 TT (6 at all) Circe, Hebe, Leda, Alarm, Renard, Antelope: 2 x 1 - 120/40 QF Mk I/II/III/IV, 4 x 1 - 47/40 3pdr Hotchkiss Mk I, 1 x 5 - 11.4/70, 1 - 356 TT (bow, aw), 2 x 2 - 356 TT (8 at all)
Complement	91

Standard scale images

Graphics

Project history

The Alarms were basically slightly enlarged versions of the Sharpshooters, differing little in appearance except for Speedy which was the only TGB to have three funnels. She was also the most successful of her type, as instead of having the unreliable and troublesome locomotive boilers of her sisters (these boilers worked reasonably well in smaller craft, but were unsuitable for such large vessels as the TGBs) she was fitted with Thornycroft's own design of water-tube boilers. In consequence she was far more reliable and could keep her speed better than the other ships. She was much the largest warship built by that firm up to that date, and they built her to the same high standards as their torpedo boats.

Modernizations

1909, Jason, Circe, Hebe, Leda, Niger, Speedy: were converted to minesweepers; - 2 x (1 -2) - 356 TT; + kite winch and gallows on quarterdeck.

Naval service

Hebe and Leda served as RNVR drill ships in 1906. Jason was mined 7.4.1917 off the West Coast of Scotland. Leda collided with cruiser Andromache at Sheerness in February 1909 and had to be beached, she was repaired and commissioned again as minesweeper. Niger was a tender to HMS Vernon until 1909, later she was converted to minesweeper and torpedoed by German submarine U12 off Deal 11.11.1914. Speedy served with Coastguard in 1906 and was damaged in collision with merchantman off Falmouth in June 1906, she was mined off the Humber 3.9.1914.