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Welcome to Navel Gazing at Camp David Shorts. I'm your host Johnathan. In this video, we're delving into the world of catamarans to uncover the significance of Catamaran Displacement-to-Length Ratio (D/L). Join us as we explore how the D/L ratio influences a catamaran's capacity to carry loads, fuel efficiency, and its capabilities for long-distance cruising. It's the key to efficient and enjoyable voyages! For a deeper dive into this topic, consider these reputable references: "The Multihull Sailor's Bible" by Joseph Neale, International Marine, 1997. "Catamarans: The Complete Guide for Cruising Sailors" by Gregor Tarjan, International Marine, 2007. Don't forget to subscribe to our YouTube channel, Navel Gazing at Camp David, and watch full tours and reviews of catamarans and monohulls with your host, David Orton. ⛵

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Suddenly they appeared in front of our boat: dolphins! They are magical animals to me, suddenly they jump in front of your boat. But only for a few minutes. They swim with you, zigzagging, diving down, jumping above the water again and then they're gone. This was at the end of February, when we made a 'turn' at the heel of southern Italy, Puglia to sail into the Adriatic Sea, towards Lecce. I was able to film the dolphins! I did not expect them this early in the season, because of the relatively cold water. But I also noticed that when the two seas (Ionian Sea and Adriatic Sea) met, the water temperature rose from 15 to 17 degrees and the depth went from 40 to 90 meters. Apparently this spot was perfect for dolphins. Bonus, 3 fun facts about dolphins: * Dolphins are incredible athletes. They swim 50-100 kilometers every day, reach speeds of up to 40 km/h and are able to make impressive jumps out of the water, sometimes up to 6 meters high! * Did you know that dolphins can experience emotions such as happiness and sadness? They show empathy towards other members of their group and even have the ability to care for each other when sick or injured. They have an extensive social life, communicating with each other through complex clicking patterns and can even call each other by name * Dolphins have unique sleeping habits because they rest only part of their brains at a time so they can continue breathing and stay alert for predators. This phenomenon is called unihemispheric sleep. During this sleep they close one eye and keep the other open to detect possible dangers. They also switch eyes regularly so that both eyes can rest. Dolphins do not sleep continuously like humans do. They rest in short periods of a few minutes to half an hour during the day. In general, dolphins sleep about 8 hours a day