Lime Point Lighthouse, The Golden Gate
The Lime Point Lighthouse, built in 1833, is situated on the northern side of the Golden Gate on a rocky spur. To warn vessels away from the dangerous hazard its two twelve-inch steam whistles were orginally powered by coal-fired boilers that required a 20,000-gallon water tank and when in use burned 250-pounds of coal an hour. In 1902 the signal was converted from coal to oil.

In 1937 the lighthouse signal was again upgraded, this time to a foghorn and light. But even that didn't stop the 440-foot freighter India Bear from running into the lighthouse during a heavy fog on June 3, 1960. Due to technological advances foghorns are no long necessary but they still sound around the San Francisco Bay on foggy nights. The Lime Point fog signal is two-seconds blast, two-seconds silent, two-seconds blast, twenty four-seconds silent.

TRIVIA QUESTION: What was built on top of the Lime Point Lighthouse in 1937?


[ MAP A-6 ]


Anonymous dutchbaby said...

Great surprise trivia answer, though the year was a great clue!

3:10 PM  
Blogger AphotoAday said...

Very interesting history...
A couple weeks ago I was peering straight down on Lime Point and wondering about her past...
--Never realized that the length of silence in a foghorn's call would figure into it's identification.

6:31 AM  
Blogger Tomate Farcie said...

OMG, great post!!! And that Trivia Answer, what a shot!!!

2:05 PM  
Blogger Aunti Juli said...

Nice! Great surprise, and I'll have to count now when I hear the foghorns.

2:17 PM  
Blogger tangobaby said...

That trivia answer shot is awesome!

4:59 PM  

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