My little PC program says the sun is rising about 07:10 now, and setting about 20:00, with twilight starting/ending about 50 minutes earlier/later.

Does this sound about right? I'm not sure if I have all my time zones set correctly in the program!

Trying to plan my dawn and night dives....

Thanks!

Looking at the archives I saw this from the Pier Cam which shows the light at the Pier Cam Start and Finish of the day

So you are about an hour out. I hope this helps.

Ah ha! Found the setting in the program! Yes, the program thinks Bonaire is on Daylight Savings Time in the summer. Silly program.

Good idea, looking at the archives. Just went and did that to confirm. Nice.

Thank you...all set now.

And the numbers even match the little program on my phone/pda.

weather and facts This is the address for all important information, Peter

you might also check www.meteo.an
the cable service is also providing accuweather

The Wunderground (Weather Underground) site lists 'astronomy' things daily including all the various morning and evening definitions of twilight, sunrise, sunset, moonrise and set and phase of the moon daily and searchable for other dates. In addition to today's weather and the weekly forecast at

http://www.wunderground.com/global/stations/78990.html

Glen, that's the same link Peter Dobson provided.

Of the definitions of twilight, I prefer the "nautical twilight" as the one most relevant to the reef turn-over, especially at dawn. Civil twilight seems too bright....things are already happening, and astronomical twilight is too dark, nothing has happened yet. So I try and get into the water a bit before nautical twilight so I can watch the whole show. It is easier in the evening, you just go in as the sun goes down!

Since it is about 50 mins from nautical twilight to sunrise, that make for a nice dive.

Anybody else have a way they plan their dawn dives?

By the way, a good discussion of civil, nautical, and astronomical twilight is at http://en.wikipedia.org/wiki/Twilight.

We found that to do a dawn dive, you need to get going well before "sunrise". It's pretty light by sunrise.

We did a 6am dive at invisibles and were able to catch the sun rising on the reef. What an awesome experience. Only disappointment was no eagle rays. I think they were sleeping.