man we will plan our trips around these things. Usually we just monitor the major and minor bite times for the day(based on solar and lunar rises and sets) and make sure we are fishing during those times. I have a watch that they sell at walmart it is the Casio(pathfinder fishing timer) you plug in your lat/long wee you normally fish and it can tell you the best 4 times of the day to be fishing also rates them from 1-5 on which is the best. The damn thing just vibrated on my arm as I was typing this telling me i should be fishing.
I have a picture from our last trip showing my watch vibrating and at the exact same time we got covered up by mahi
here is a link
http://www.nextag.com/Casio-Pathfind...52/prices-html