British K-class submarine
1917 CLASS OF BRITISH SUBMARINES
K-boat; K boat; British k class submarine; British K class submarine; HMS K21; HMS K23; HMS K24; HMS K25; HMS K27; HMS K28
The K-class submarines were a class of steam-propelled submarines of the Royal Navy designed in 1913. Intended as large, fast vessels with the endurance and speed to operate with the battle fleet, they gained notoriety and the nickname of "Kalamity class" for being involved in many accidents.