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Old 27 October 2009, 14:30   #31
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with flat batteries usually ?????
Not me. Fierd o the day yer never saw! hehe..

Spose that's my argument fried, then..
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Old 27 October 2009, 14:40   #32
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I don't think the RNLI stopped using them because the Atlantics lost power at night, more to do with how do you know when it is and isn't working. I know it comes with a unit to show when its been interrogated but I'd rather have a unit that works less well all the time than a unit that may fail when I need it most.
But is there a known problem? If a tiny number of units actually spontaneously fail in the field then I'd rather have the more effective system, and accept that there is a very small chance it will fail, and that I may not be aware it has failed, and that Radar recognition by the third party would be "critical" to the activity I was undertaking at the time - than have a system which is effectively "failing" some of the time on every trip.

Why not have both if you are that concerned and have RNLI budgets?
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Old 27 October 2009, 14:47   #33
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The Sea-me has a monitor LED which indicates it's in action. It is triggered by the increased current used for retransmission of the received radar pulse so if the LED lights, the unit is transmitting.
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Old 27 October 2009, 14:52   #34
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Interesting re the heat issue on the AIS engine - we were going to place it inside the console in a fabricated waterproof box - so doubley protected - might have to rethink if heat is a concern

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Old 27 October 2009, 15:03   #35
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cant think there would be that much heat. NASA gear has always been cheap and cheerful but if it works cheap is good! Interesting when their ais came out I made enquiries re getting hold of one for a magazine test but got a short reply to say it wasnt waterproof and a rib was the wettest boat they knew.
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Old 27 October 2009, 15:16   #36
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Interesting re the heat issue on the AIS engine - we were going to place it inside the console in a fabricated waterproof box - so doubley protected - might have to rethink if heat is a concern

J
Heat isn't an issue. It draws a few milliamps, how much heat can you make with that!?
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Old 27 October 2009, 15:24   #37
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Okay excellent - so it was just the supplier who was concerned with possible heat issues

Quote:
His opinion was not waterproof as we know but also "not suitable for an open boat even in a consol although some folk have fabricated their own waterproof box but be aware of any heat issues"
Will continue with the mission of finding a suitable waterproof box

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