Haulbowline is an Island in Cork Harbour and is the current headquarters of the Irish Navy.
At a strategic and deepwater position in the harbour, the island has long been a military base. The island was first fortified in 1602, and initially an important base for the British Army. Later, the British Army moved to nearby Spike Island, and the fortifications were handed over to the British Navy. The Navy established a large arsenal on the island, and a naval dockyard was built during the Napoleonic Wars.