Quote:
Originally Posted by ctfphoto
U guys r getting a late start 
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When is nautical twilight/BMNT for La Jolla Shores now?
There should be an app for that.
EDIT:
I asked Siri "When
WAS nautical twilight in La Jolla?" and got an immediate crisp answer: 5:23am PDT; Sunday, August 23, 2015
Asking "When IS nautical twilight in La Jolla?" diverts to a list of other website blah-blah.
SHORTCUT: Nautical twilight is approximately one hour before sunrise (Sunrise was 6:17 am today in La Jolla).
Light refraction from city lights, moonlight, and moisture in the air can create these same navigable light conditions at an earlier time.
That makes 5am a good target time to be on the beach tightening things down with a flashlight and reviewing our checklist.
Personally, I find emerging light at twilight to be a magical and inspirational time to launch the day for any purpose
"Meeting in the parking lot at 5:30" .... then waiting for multiple people to scratch their heads and bounce around is a buzz-kill.
Especially if I'm the one slowing someone else down