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| August 2007 - Marina E-Newsletter | ||||||||||||||||||||
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Coming In September - Red Bull Air Race It's no bull - Plans are well underway to have the Red Bull Air Race over San Diego Bay in September. The event will take place in a wide area of the bay from just North of the Coronado Bay Bridge to just North of the "G" Street moll (Where the Fish Market Restaurant is located).It promises to be an exciting event, but you need to be aware of the planned impact to all boating in the area of the event. There will be periodic bay closures for periods of setup through the actual races. This extends from Wednesday, September 19th through possibly Sunday, September 23rd. We'll have more firm details for you in the September newsletter. ![]() Between the Sheets - Entering and Leaving Harbors That Have a Jetty and a Channel In boating there is a saying that the two most valueless things you have are the open seaway behind you, and the boat speed you don't have. This is especially true when entering a harbor where the entrance is via a channel that has a jetty like Mission Bay or Oceanside, and you did not begin your approach from the harbor's channel buoy. I witnessed a sail boat approaching the mission bay channel from the South along the beach line very close to the South channel jetty, when he lost all forward boat speed, and the ocean put him and his boat on the jetty. The channel buoy is the point where you should start your approach to such a harbor, and likewise where you should end your departure from the harbor. This applies to sail boats and power boats, and provides you with the most open seaway and thus the most leeway if things go wrong. Remember, all buoys are provided to ensure our safe departure and return on our journeys. Here's a link to a neat 4-page PDF on the California Department of Boating and Waterways that has some great buoy identification charts. See you on the water! Editor's Note: Richard Benscoter is a long time avid sailor. He's a member of the Silver Gate Yacht Club and owner of The Mariners Woodshop. If you have a sailing question for Richard, send e-mail to richard@BlueSkyNews.com.Around the Circuit - Electrolysis and Galvanic Corrosion Id like to re-visit a topic everyone's familiar with, and probably a bit confused about, Electrolysis. Electrolysis is the condition when electrical current is leaking from the battery and flowing to ground using a boat's underwater hardware as the conductor. Ground being in this case the sea water surrounding the vessel. The two photos in this article illustrate what electrolysis is, and the difference between it and galvanic corrosion. I get a lot of calls from guys like Alex at the San Diego Diving Services to inspect boats they think may have electrolysis problems. They observe boats that are having reactions around their through hulls, and want to know if the boat might have stray electrical current, i.e. electrolysis. Props and shafts are most likely to be damaged by electrolysis because the en gine blocks are usually the common ground point for the entire electrical system. Stray current on an un-bonded boat will find a path to ground, and the easiest route is usually through the shaft. This prop and shaft show deterioration from electrolysis. Notice how the prop appears a little pinkish. That's the sign of stray current eating up expensive parts.The through hulls in this photo aren't pink, they are darker, and the paint around them has been damaged. This is an example of "paint halos" which are usually caused by a bonded boat having too much zinc attached. Paint halos seldom hurt fiberglass or metal boats, but if you have this condition on a wooden boat you need to take corrective action. Wood damage from too much Zinc can and does occur around through hulls with too much zinc installed. Editor's Note: Brett Dingerson has over 25 years experience as a marine electrician, with a specialty in marine galvanic corrosion protection. He has worked with a wide range of sailing and power vessels and is the owner of San Diego-based Marine Electric. If you have a maintenance question for Brett, send e-mail to brett@BlueSkyNews.com.The Legend of the Scripps Canyon Sea Monster In the early 1960s, the Marine Physical Laboratory, which is a division of the Scripps Institution of Oceanography began experimenting with RUM (The Remote Underwater Manipulator) off the coast of the Scripps Canyon in La Jolla. Launched from the beach next to the Scripps pier, the strange vehicle was designed to crawl about on the sea floor at depths down to 6,000 meters to gather objects and samples, to take photographs, and to install deep-sea instruments Starting with a Marine Corps self-propelled half-track rifle carrier; scientists added a boom and a steel claw that could be pivoted in any direction out to about five meters to pick up objects. The gasoline engine was replaced with a pair of heavy electric motors in an oil-filled compartment. Sonar was installed, and a powerful light and four television cameras for sea-floor surveillance from a portable shore station (actually a bus). Power for RUM and sensor signals were provided by way of a coaxial cable 8,000 meters long. Only problem was that nobody told the local population about RUM, so nighttime trials resulted in a frightening bright light moving about on the ocean floor. Police and news media were flooded with calls from people imagined everything from sea creatures to foreign invasion. Early tests of RUM were only moderately successful. On one of its earliest sea trials, in 1970, RUM placed two small sonar reflectors on the sea floor, crawled away from them, and returned to find and retrieve them. It also found a third sea-floor object:, a stewed tomato can that was found to be the dwelling of a small and very frightened octopus. Rum was then set aside to be used in later projects. National M arina DayOn Saturday, August 11th from 11a.m. to 3 p.m. the Sun Harbor Marina is celebrating the 6th annual National Marina Day. National Marina Day is an annual celebration of the role marinas play in waterfront communities all across America. Interested persons are invited come and enjoy the fun and informative events they have planned which include demonstrations and presentations by the Coast Guard, the Red Cross, boating experts, plus several vendor displays. For more information, call Sun Harbor Marina at 619-222-1167. Free Electronic Recycling Recycle San Diego has a new, permanent location. They will accept your old computer monitors, laptops, televisions, toner/ink cartridges, TV consoles, cell phones, computer towers, and LCD monitors. They are located at 7716 Clairemont Mesa Blvd and are open Monday-Friday from 9 a.m.-5:00 p.m., and on Saturday from 9 a.m. - Noon. Call 866-525-6655 or visit www.recycleSD.com for more information. |
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![]() PC Tip Of the Month Are you one of those people who scroll through a bazillion of your deleted or sent e-mails to find the one you sent to uncle Harry last year? If you use Microsoft Outlook, check out the "Find" option under the "Tools" menu. It will do the searching for you. You can look for any specific word you want to find (such as Harry) and select any e-mail folder you want to search in, and the system will instantaneously give you the answer. And here's the beauty! The find function will not only look for the word you're looking for in the To, From, and Subject lines, but also in the actual body of the messages themselves! When you're done with the Find function, just click Find under the tools menu again and it will go away (It's like an on-off switch). Happy Hunting! |
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