There is one on which type of anchor is best for what kind of bottom and a really in-depth look at tides, which frankly, I thought I had a pretty good grasp on until I read this article. Most recently (today) is a tip about food packaging when chartering a boat and how a little preperation can help you keep things in order.
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One of the older ones, though not much older, explains why you generally have to overshoot a mark on an upwind course because of the drift down that you will incur. Stuff like that. If you're looking for some sailing knowledge, definitely check out this blog.