SM U-9
WWI German U-Boat

The Kaiser´s U-Boat S.M. U9
WWI German U-Boat SM U-9

Builder:
Kaiserliche Werft, Danzig

Design:
Her construction was ordered on 15 July 1908 and her keel was laid down by Kaiserliche Werft in Danzig.
She was launched on 22 February 1910 and commissioned on 18 April 1910.

U-9 had an overall
length of 57.38 m (188 ft 3 in),
her pressure hull was 48 m (157 ft 6 in) long.
The boat's beam was 6 m (19 ft 8 in) (o/a), while the pressure hull measured 3.65 m (12 ft 0 in).
She had a draught of 3.13 m (10 ft 3 in) with a total height of 7.05 m (23 ft 2 in).
The boat displaced 493 t (485 long tons) when surfaced and 611 t (601 long tons) when submerged.

General characteristics:
Displacement:
493 tonnes (485 long tons) surfaced;
611 tonnes (601 long tons) submerged.
Length:
57.38 m (188 ft 3 in) (o/a);
48 m (157 ft 6 in) (pressure hull).
Beam:
6 m (19 ft 8 in) (o/a);
3.65 m (12 ft) (pressure hull).
Height 7.05 m (23 ft 2 in).
Draught 3.13 m (10 ft 3 in).

Installed power:
2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with a total of 1,000 PS (740 kW; 990 shp)
2 × SSW electric motors with 1,160 PS (850 kW; 1,140 shp)
550 rpm surfaced
460 rpm submerged
Propulsion:
2 shafts
2 × 1.45 m (4 ft 9 in) propellers
Speed:
14.2 knots (26.3 km/h; 16.3 mph) surfaced
8.1 knots (15.0 km/h; 9.3 mph) submerged
Range:
1,800 nmi (3,300 km; 2,100 mi) at 14 knots (26 km/h; 16 mph)
80 nmi (150 km; 92 mi) at 5 knots (9.3 km/h; 5.8 mph)
Test depth:
50 m (160 ft)
Boats & landing craft carried:
1 dinghy
Complement:
4 officers, 25 enlisted
Armament:
four 45 cm (17.7 in) torpedo tubes (2 each bow and stern)
6 torpedoes
1 × 3.7 cm (1.5 in) Hotchkiss gun
1 × 5 cm (2 in) SK L/40 gun (from 1915)
1 × machine gun
12 P-Mines (March–December 1916)