A group of very excited scuba divers with Great Adventures Cruises at Green Island were treated to a rare encounter with a young adult dugong. Estimated to be around 2 metres in length, this was the first dugong sighting recorded by Great Adventures divers at Green Island in several years. It was also the first ever sighting for videographer Dan Liu and two very lucky introductory divers on holiday from Ballarat Victoria. “It was so exciting to see! He was very curious swimming near us as the group were diving on a nearby coral bommie. He came close within about 4 metres, swimming away and then coming back for another look before swimming off over the seagrass beds,” said Dan Liu. Dugongs, often called sea cows, as they graze shallow seagrass meadows (eating up to 40kg a day!) are found across the tropical belt in Australia. They reach a length of 3 metres, live up to 70 years of age and can weigh as much as 400kg. Dugongs are fascinating mammals, sharing a common ancestor with elephants, and early sailors are believed to have confused them for mythical mermaids. They are most closely related to the manatee, their northern hemisphere relative. They resemble a large dolphin but lack a dorsal fin and have an upper lip covered in thick bristles. They are well designed for aquatic life, with nostrils situated on top of their heads so they can breathe, and have a large, strong tail that propels them through the water. Their eyes and ears are on the side of their heads. Although their eyesight is poor, they have an acute sense of hearing.” Dugong are threatened on a worldwide scale and in Australia, are a protected species under various legislation including the Great Barrier Reef Marine Park Act 1975. This important sighting will be reported to GBRMPA’s Eye on the Reef monitoring program contributing valuable information about these endangered creatures as well as the long-term protection and management of the reef. Video credit Dan Liu, Island Photography Australia

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Seconda Promo uscita AVNEWS Periodico Gratuito di Informazione sulle attività di Avventuravela - 25 ottobre 2011 A.S.D. AVVENTURAVELA Crociere e avventure in barca a vela nella meravigliosa Isola della Sardegna e non solo... Ciò che conta é il viaggio, non la meta! Libertà, partecipazione, condivisione! SITO: www.avventuravela.it FB: www.facebook.com/avventura.vela PAGINA FB: www.facebook.com/AvventuraVelaNews

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We got increasingly frustrated by our small petrol (gas) outboards that we use very infrequently on our dinghies and Chat 18 catamaran. Never quite knowing whether they would start, or how long they would run. Usually because the small jets would clog up, a problem aggravated by the ethanol fuel now used in the UK, USA and elsewhere. So earlier this year we bit the bullet and bought a used Torqeedo 1103 electric outboard. It was on ebay, from "one careful lady owner" - actually the advert said "only used on a fresh water trout farm" which we hoped was much the same thing. And we have been very pleased with it this summer, using it on Sagitta's tender, sometimes for long distances, yet never seeing the charge drop below 80% So we then tried using it on our Chat 18. And immediately discovered two problems, probably common to other small daysailing boats. First, the battery was much larger than the integral petrol fuel tank. So, when tilted up on the swingdown bracket, the Torqeedo hit the tillerbar. That meant we had to use the transom mount, which in turn meant the leg had to be angled back in use to clear the immersed rudder blade. Very inefficient and too close to the surface. And second, when tilted up and turned sideways the tiller control arm would detach - something that doesn't happen with a petrol outboard. So we had to remove it, and then reattach it whenever we wanted to motor. Fortunately Torqeedo has realised that many people have these problems and so supply reasonably priced, extra long cables, not just for the battery but also for the tiller arm. Accordingly we bought a 1.5m (5ft) battery cable and a 5m (16ft) tiller cable. This video shows the results of the first motor, one calm winter evening. I still have to re-route the cables through the back of the cockpit and more permanently mount the tiller arm. The deeper propellor is more efficient and there is no aeration when cornering or in waves. Top speed was very close to 5 knots, about hull speed on an 18ft boat. In reverse speed was about 3 knots. Although it's more awkward to lift the outboard leg without the battery in place it does now fit comfortably below the tillerbar when raised for sailing. So we're very happy so far! For once there is audio on this short video. But even if you turn the volume to high you won't hear the outboard - another bonus! More on the Chat 18 here https://sailingcatamarans.com/index.php/designs-2/2-catamarans-under-25ft/475-chat-18-daysailing-catamaran And Torqeedo here https://nestawayboats.com/

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