Hello Augustin!
Saturday November 23 1996, Augustin Henriques writes to Jackson Harding:
 AH>     Season's Greetings Jackson,
Likewise.
 AH>> ii)      GP FL(3) 12s 34Feet 13M (U)
 JH>> Group of three flashes repeated over a 12 second interval.  The light
 JH>> is 34 feet above sea level and has a nominal range of 13 nautical
 JH>> miles.
 AH>    -+--+--+--+--+--+--+--+--
 AH>      I'd like to get this straight.  Does the 12s mean 12 secs of 
darkness
 AH> after the flashes, or does it mean groups of three flashes repeating for 
a
 AH> 12 sec duration?  BTW, you forgot the (U) which means "unwatched" :^)
It means the whole period of the light is twelve seconds.  Flash - Pause - 
Flash - Pause - Flash - Long Pause, all in the 12 s.  There is a set time 
interval for what constitutes a flash, a quick flash, a very quick flash and 
an ultra quick flash (the last is exceedingly rare) and a long flash.  From 
memory a standard flash is approx 1 second, as is a standard pause, so this 
cycle should be:
on 1 second, off 1 second, on 1 second, off 1 second, on 1 second, off 7 
seconds.
As for the "U", oops :-)  I'm also cheesed off I missed Al for alternating, I 
certainly do know that one, usually you get something like Al WG or Al WR, 
which gives it away (Alternating White - Green and White - Red).  The former 
is usually an aeronautical beacon at an airport that is visible from seeward.
Bye for now,
          Jackson
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