Pathfinder-class cruiser

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HMS Patrol.jpg
Class overview
Name: Pathfinder
Operators: RN Ensign Royal Navy
Preceded by: Forward class
Succeeded by: Sentinel class
In commission: 1905 - 1919
Completed: Two
Lost: One
General characteristics
Type: scout cruiser
Displacement: 2,940 tons
Length: 385 ft (117.3 m) o/a
Beam: 38.4 ft (11.7 m)
Draught: 13.8 ft (4.2 m)
Propulsion: Two 4-cylinder triple-expansion steam engines driving twin screws
Speed: 25 knots
Range: Carried 160 tons coal (410 tons max)
Complement: 268
Armament:

As built

As modified 1911/12

Armour: conning tower: 3 inch
deck: 1.5 inch - ⅝ inch
belt: 2 inch

The Pathfinder class was a two ship class of scout cruiser serving with the Royal Navy in World War I, and consisting of the ships HMS Pathfinder and HMS Patrol.

The three funnelled 'scout' cruisers were designed to operate as the lead ships of destroyer flotillas but, like other similar ships, were soon outrun by newer classes of destroyers and relegated to secondary duties. The Pathfinders were built by Cammell Laird and had only a partial armoured deck with side armour covering the engine rooms rather than the more usual full length protective deck. Pathfinder was originally to have been named Fastnet but the name was changed before construction was started. The scout cruisers had poor endurance, leading to the loss of the only scout cruiser sunk during the war, HMS Pathfinder. She was so short of coal whilst on patrol that she could only manage a speed of 5 knots making her an easy target for the German submarine U-21 and giving her the distinction of being the first warship sunk by submarine torpedo attack.

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