| how to estimate slack water
One of my main drivers for buying a rebreather is to get more bootom time in on dives. Based on experience / v-planner, measuring SAC rate, and swim speed in caves, I have a good idea of the run times (limited by baiilout gas) and the distances round wrecks I can cover in a given time. Have a few fudge factors for bottom time based on how high the wreck rises from the bottom too. I understand that spring tide slack is MUCH less than neap tide slacks, and that high water slack windows are often longer than low water slack windows. Are ther any easy / basic ways to estimate / predict the slack water window available for UK sea diving? I don't mind going in 5 to 10 mins before slack, coming up 5 to 10 mins after slack water, so only looking for an estimate +/- 5 mins resolution. Have looked to tide plotter software etc, but they are accurate at prdicting tides, can't see any obvious way to predict slack duration. Not even sure what the normal ranges are... (20 mins spring tide to 1hr+ neap tide?) |