When you look out at the calm, blue Long Island Sound, it’s hard to imagine this was once a high-stakes military theater. But during World War II, this was a vital industrial and strategic artery – and Nassau County’s northern coastline sat right on the front lines of defense.
As part of Nassau County’s America250 celebration, we’re diving deep into the local maritime history that helped defend global democracy. From local shipyards to camouflaged lookout stations, here is how Nassau County and the Long Island Sound served as a shield for the home front.
Gateway to the Atlantic: The Naval Routes & Shipbuilding
The Long Island Sound wasn’t just a buffer zone during the war – it was a highway for freedom. It provided a protected inland route for warships, submarines, and cargo vessels traveling between the massive naval yards of New York City and New England.
Because the Sound offered deep water shelter from the open ocean where German U-boats actively prowled the Atlantic coast, it became an ideal training ground and transit corridor. It also represented significant industrial might. Small boatyards along Nassau’s North Shore bays were re-tooled overnight. Places like Oyster Bay and Port Washington produced essential small craft, including rescue boats, barges, and components for amphibious landing vehicles. And just inland, companies like Grumman and Republic Aviation built thousands of fighter planes (like the F6F Hellcat). Many of these aircraft were barged across or flown directly over the Sound to be tested or loaded onto transport ships.
Guardians of the Sound: The Lighthouses
Also key: critical lighthouses along the Sound. To prevent enemy infiltration while ensuring safe passage for Allied shipping, the federal government placed local lighthouses under military control.
The iconic Stepping Stones Lighthouse, sitting just off the coast of Kings Point at the western entrance to the Sound, played an invaluable role. Under Coast Guard jurisdiction during the war, this lighthouse served as a critical visual waypoint for heavily laden cargo vessels heading toward the East River. Its keepers stood double duty, scanning the waters not just for natural hazards, but for any sign of saboteurs or unusual marine activity attempting to slip into New York Harbor.
Eyes on the Horizon: Coastal Lookout Stations
With the threat of German U-boats lurking just off Montauk and the ever-present fear of aerial bombardment, Nassau County’s shoreline required constant vigilance. To keep watch, civilian and military cooperation merged seamlessly along the county’s beaches. Coastal lookout stations and observation towers sprouted along high vantage points from Sands Point to Bayville.
The Ground Observer Corps, largely made up of local civilian volunteers, manned these stations 24/7. Equipped with binoculars and aircraft silhouette charts, these volunteers scanned the skies and the Sound, ready to relay any suspicious sightings directly to the military command center in New York.
The Outer Wall: WWII Coastal Defenses
While Nassau County provided the inner security and lookout networks, it was backed by massive firepower at the Sound’s eastern gates. The military recognized that if an enemy fleet bypassed the outer islands, Nassau County’s industrial centers would be completely vulnerable.
The Harbor Defenses of Long Island Sound formed a terrifying gauntlet for any adversary. Massive artillery installations at Fort H.G. Wright (Fishers Island), Fort Michie (Great Gull Island), and Fort Terry (Plum Island) were modernized during WWII with colossal 16-inch guns capable of hurling shells 25 miles out to sea. This heavy network ensured that the inner waters of Nassau County remained a safe haven for Allied production and transport.
Exploring Nassau’s Maritime Legacy Today
While the military grids and blackout curtains are gone, this epic history remains etched into the coastline. This year, as we celebrate America250, take a drive down to the North Shore and stand on the shores of Garvies Point, look out on the horizon from Sands Point Preserve, or catch a glimpse of Stepping Stones Lighthouse from the civilian docks. And when you do, know that you aren’t just looking at a beautiful waterfront. You’re looking at a historic corridor where ordinary Long Islanders stood watch to protect the free world.
