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New tide watch - Nightmare:nerd:

JoeinMemphis

Active member
Hi all, I just picked up a new tide watch. So far this thing is a nightmare. I am wanting to set it for Panama City, the book says GMT differential is -4 (DST) Longitude 80*W and the Lunitidal Interval is 3:00. I set it as such, but it doesn't jive with the tide charts found on the net. I went through the whole figuring out the time the moon is above the horizon, divided by 2 to find the "Moon Up" time, then added that to the moon rise time, and did some more "stuff" involving the time to the next high tide etc etc etc. I feel like the next computation will have something to do with the train leaving Chicago .....What am I doing wrong??
 
Tides aren't really so mysterious. On the east coast we have semi-diurnal tides (two highs and two lows) each day and on the west coast they have diurnal (one high and one low) each day. The range of the tide differs as well and is dependent on the location. The time by the book is correct as we are in a +5 time zone but we are on daylight saving time so it becomes +4 because of this. All time is based on GMT (Grenwich Mean Time), which is the zero meridian and is so named because it passes through Greenwich, England. I wouldn't worry too much about the moon. Just check your local tide tables and set your watch/clock to coincide with them. It should work okay and the differnce between high and low should be approximately 6 hours where you are. Best of luck.
Jerry
 
Thank you Jerry. I thought I was loosing my mind. I wasn't aware of two highs and two lows. I live in Memphis, we are kinda short on salt water beaches !! I was going by other posts on here that stated they took a spin down the lane at low tide (and assumed there was only one per day ). Thank you again for clearing that up !!! HH Joe
 
I think most tide watches/clocks do not work in Florida because of the 4 tides a day as thinkin has said, most watches/clocks are set up for 2 tides and won't work.
 
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