I've been reading the manual, but am still having trouble setting up my G-shock. I live in San Francisco, and the longitude is 122 degrees West. But, how do I calculate the lunitidal interval, and how do I set up the moonphase?? I'm hoping someone would be kind enough to walk me through the setup and maybe enlighten me about what all these terms are?? Is there anything else I should know about when dealing with these kind of G's??