The Calliope Dock is a historical stone dry dock on the grounds of the Devonport Naval Base, in Devonport, Auckland, New Zealand. It was built in 1888 to service ships of the British Royal Navy, and is still in use today. As built it measured 525 ft (160 m) by 110 ft (34 m), narrowing to 80 ft (24 m) at the gate. The water on the sill was 33 ft (10 m) deep. It was extended in 1936, 1943 (to 185 m (607 ft)) and again in 1996.