Hermit
Well-known member
until somebody jams the GNSS (GPS et al) signals - which was where this tread started
.......until someone or something renders the GPS unreliable.
No, not at all. The ECDIS is quite capable of manual visual fixing. Take a bearing, line it up and input it to a fix tote. Fast and very accurate as the time of the bearing line can be to the second.
Yes, it relies on power to keep the ECDIS console running - but they all have uninterruptible power supplies (UPS).
Yes, need power to keep the 2 gyros (actually, intertial navigation systems so as well as heading they give a position output so don't really need GPS anyway) and have UPS. Plus they have a corrected mag compass.
Yes, they also carry sextants, but they are more used for HSA's and VSA as per the Capn's post. (HSA and VSA can also be plotted on ECDIS).
I state a little interest - I did the course shown above in 2006 and now deliver and maintain the Integrated Navigation and Bridge Systems for the Type 45s, Type 26s and Type 31s
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