Battery Alexander, fully armed by 1906, mounted eight 12-inch mortars designed to fire shells in a high arc - up and then down onto the decks of enemy battleships. Low-trajectory gunfire from nearby batteries, aimed close to the enemy's waterline, . . . — — Map (db m102819) HM
Never named because it was never finished, this battery was designed for the biggest, most powerful guns ever used by the United States military - 16-inch caliber weapons that fired 2,100-pound shells and could hit ships 26 miles out to sea. . . . — — Map (db m102778) HM
Battery Mendell's mission was to keep enemy warships farther from San Francisco's harbor than any of the earlier coastal defences were equipped to do. Built in 1905, the battery was positioned as far west on the headlands as possible and armed with . . . — — Map (db m102829) HM
The Marine Mammal Center is built on the site of the former Nike Missile Launch Area, SF 87L. In the 1950s, the army constructed two batteries in the Marin Headlands equipped with surface-to-are missiles, one near Fort Cronkhite and a second across . . . — — Map (db m102832) HM
Despite its imposing appearance, Construction 129 was never used - or even completed. It was to have been armed with 2 guns having massive, 16" diameter barrels. Each weapon weighed almost 1,000,000 pounds and could accurately fire a 2,100 pound . . . — — Map (db m102784) HM
For the first three-quarters of the 20th century, the Marin Headlands were fortified with weapons that evolved from cannon to nuclear warheads. The guns became more and more powerful, able to hit warships miles out to sea. Antiaircraft guns appeared . . . — — Map (db m102828) HM
By 1945, the age of aerial warfare had fully arrived and the U.S. Army sought a weapon that could intercept enemy aircraft. In 1951, after years of research and development, a supersonic missile controlled by ground-based electronic equipment was . . . — — Map (db m102818) HM
Three plaques provide an historical overview of the the Sausalito ferry terminals.
In 1907 the rail system in Sausalito was expanded to consolidate facilities so that interurban trains could operate only from Sausalito. . . . — — Map (db m102437) HM
The Golden Gate Bridge, completed in 1937, is a monument of the last century, and could be damaged by a strong earthquake. Seismic retrofit construction is underway to transform the international icon into a strong and flexible structure that can . . . — — Map (db m102776) HM
For thousands of years Native Americans lived in the Bay Area harvesting animals, salt, and acorns. The changes they made to the landscape were limited. They used fire to shape oak woodlands and grasslands. cultivated plants, and collected salt in . . . — — Map (db m102474) HM
Providing a narrow entrance to the west coast's most defensible harbor, the strategic value of the Golden Gate is readily apparent. Between 1776 and 1846, Spanish, then Mexican, guns defended the harbor entrance. Starting in 1846, American soldiers . . . — — Map (db m102777) HM
The Golden Gate Bridge is a structure of striking form and elegance. Built in 1937, it remains an indispensable link in the Bay Area's transportation network and a historical monument of civil engineering and construction. The bridge was named for . . . — — Map (db m102433) HM
This is a memorial to every one who ever sailed out of the Golden Gate in the service of their country - in the Navy, the Marine Corps, the Coast Guard, the Merchant Marine.
A ship heading for sea passes directly by this spot at the northern . . . — — Map (db m69495) WM
In 1822, English-born Richardson arrived in San Francisco Bay on the whaler "Orion." After his baptism at Mission Dolores, he married Maria Antonia Martinez, daughter of the Commandante of the Presidio. In 1835, he founded Pueblo Yerba Buena, later . . . — — Map (db m102432) HM