Boatworks

Radar Revolution

by Tim Bartlett, Posted June 15, 2009
For the past 60 years or so the basic principles of marine radar have not changed. A radar transmits very short pulses of microwave energy and receives echoes reflected back from solid objects. The direction of an object is indicated by the direction from which the echo returns, and its range is determined by the time interval between when the pulse was transmitted and when
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Clues for Clews

by Win Fowler, Posted June 14, 2009

Jim Ballantine of Charleston, S. Carolina, asks:

 

’ve installed new adjustable cars for my genoa aboard my 39-foot sloop. But now that I have them, I’m not sure what adjustments I should make to the cars when sailing in different wind conditions. I do know that whenever I reef down the headsail I should move the cars forward. But I’m not sure what other adjustments to make


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Faded Glory

by Don Casey, Posted June 14, 2009
David Watkins of Parrish, Florida, asks:

"I have a 15-year-old fiberglass boat that I bought new. It has spent most of its life either in Florida or the Caribbean and has suffered severe exposure to the sun. There is surface crazing or cracking on the deck, coach roof, and upper topsides. These are not stress cracks, but they are widespread. Do you have some thoughts on


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See Dog

by Gordon West, Posted May 20, 2009
Jack Hammond of North Carolina, asks:

"Reception was good on my analog TV using a Shakespeare SeaWatch 2025 amplified omni-directional masthead antenna. But I’ve been told the new digital converter box won’t work with this antenna and that I should get a new TV. Is this right?"

Gordon West replies:

The antenna is fine but make sure the converter


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GPS system questions

by Peter Nielsen, Posted May 20, 2009
The Government Accountability Office’s report last week on the parlous state of the Global Positioning Satellite system should set alarm bells ringing. When a body like the GAO warns that the GPS system is in crisis, all of us – not just sailors – need to take notice. GPS technology is so omnipresent in modern life that few areas of transportation remain unaffected by it.

The GAO report


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