Sequence of updating my transas ecdis
If the ECDIS expects a Lat/Long and you've just got radar ranges/bearings or visual bearings how are you meant to convert them to lat/long with no paper chart?Oops, we're wandering, might set up a separate "CD's ponderings on ECDIS" thread.Say I take some visual bearings, can I plot them to compare with the GPS position?Sam Electronics NACOS allows you too, but its a pain in the arse - basically you have to key in a manual Lat / Long and time taken - although it can calculate LOPs from Celestial fixes for you.Seriously though, I'm all for ECDIS and as a cruise ship cadet I like to think that our training equips us very well - we are the electronic navigators and I'm happy to be here during a huge change in the way navigation is conducted.But I think there's still a place for the paper chart on the modern bridge.Transas is pretty user friendly - worked out pretty quickly how to plot LOPs and get a point about looking through windows was more about how you gain and prove the information that your then plotting onto a paper chart.Navigation in coastal waters should be primarily by visual and radar fixing, whether plotted on paper or electronic charts. ) ECDIS systems do not make it easy to do so is disturbing.
So if you lose your GPS there's effectively no way to plot a fix if you don't have paper charts available?
I was on a ship where the captain managed to unplug the main GPS (we were about a thousand miles from land so it wasn't a major problem) but it was amazing how many alarms went off because of a radar overlay its fairly easy to see if the gps is giving wrong data as the digital chart wouldnt be under the returns, If CD believes he would feel safer using a paper chart it becomes much harder to check that the GPS is still correct without having to go look through the windows.
it does come down to how much you trust the technology and how well you can use it Hate to ruin your day but alas most charts don't match the radar returns (admittedly usually only by a few millimetres - but some are considerably out, especially the ones for the Greek and Turkish ports and coastal waters :) purely because although there ENC charts, there based on information taken from surveys done decades ago.
You're right, I suppose there's so many advantages.
Silly question though, and one that I should really have asked at sea, but is it possible to plot "manual" fixes on ECDIS?