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Old 06-08-2018, 17:44   #16
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Re: Single point of failure

Tillbury,


I agree completely with your priorities.


I have two Standard Horizon handheld VHF transceivers with GPS and DSC - both in their charging stations - at all times (except when I toss one in the microwave and wear the other one). I also have two Tiller Pilots. My experience with the Tiller Pilots is that they only start to go goofy when their supply voltage drops below about 11 volts (I've bench tested this). So I have a 20 amp/hour gell cell that's kept charged but never used to swap in with a cutover switch if the boat's main supply goes down. That'll give me several hours to try to fix things. It is admittedly not as good as a wind vane, but it's something.
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Old 07-08-2018, 00:58   #17
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Re: Single point of failure

Quote:
Originally Posted by jewt View Post
Rather than be concerned about a few instruments when you do have paper charts, how about that new computer controlled engine?

jewt
S/V Bifrost
Yes - so a little more detail is probably in order at this point:

(a) We dont go anywhere without the paper charts;
(b) We have a total of 4 GPS's inputs on the N2K network;
(c) We have at least two standalone GPS's (1 x phone and 1 x handheld VHF w/ GPS)

So there is quite a bit of redundancy in that regard.

We don't have a sextant, but I have used one many moon's ago, though would struggle to do a noon fix let alone make sense of it.

AG
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Old 07-08-2018, 01:12   #18
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Re: Single point of failure

Quote:
Originally Posted by BigAl.NZ View Post
Yes - so a little more detail is probably in order at this point:

(a) We dont go anywhere without the paper charts;
(b) We have a total of 4 GPS's inputs on the N2K network;
(c) We have at least two standalone GPS's (1 x phone and 1 x handheld VHF w/ GPS)

So there is quite a bit of redundancy in that regard.

We don't have a sextant, but I have used one many moon's ago, though would struggle to do a noon fix let alone make sense of it.

AG
In that case, you are already well equipped. No need to upgrade point (b) since that system may be killed by a single lightning strike anyway. Points (a) and (c) (and the sextant) will provide you the required redundancy.
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Old 07-08-2018, 02:12   #19
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Re: Single point of failure

NMEA-0183 is balanced and shielded just like NMEA--2K.
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