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Showing results 1 to 9 of 9
Search took 0.00 seconds. Search: Posts Made By: Adelie
Forum: Navigation 25-11-2012, 10:28
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

Yep, Lapook's variation, love that method.
Forum: Navigation 22-11-2012, 07:24
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

That's akin to saying that if you have never heard of Galileo and Newton it's questionable whether you know enough about physics to walk. I'm stretching the analogy a lot but you get the idea.
...
Forum: Navigation 05-11-2012, 16:29
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

In a limited way it probably is training, but it is probably for a whole host of other reasons too, such as:

1) Limited accuracy of the maps as regards basic relative positions of items on the map...
Forum: Navigation 01-11-2012, 08:15
Replies: 219
Views: 25,105
Posted By Adelie
Re: simply do not have a clue

So you think we are either lemmings or stupid?
Forum: Navigation 31-10-2012, 08:51
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

The problem is that is no good way to get the data.

The only convenient way to get the data would be to look at groups of boats of boats traveling together for long periods.

You might think...
Forum: Navigation 30-10-2012, 20:21
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

For Lunars you need to see the moon and several other bodies, the son may be one of them but it is not mandatory.
Forum: Navigation 30-10-2012, 19:15
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

By GPS time I meant the time that the machine uses which I assumed it would also display. Apparently I was wrong about that in the case of the GPS's you use. Do you know if there is a universal...
Forum: Navigation 30-10-2012, 08:23
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

Wrong, total cost about $200. If this is a backup system, not a primary system you can get by with bottom of the line until you hit the next port and can make repairs.

60 - Davis Mark3 sextant...
Forum: Navigation 29-10-2012, 20:48
Replies: 219
Views: 25,105
Posted By Adelie
Re: Poll-Blue water. Is a Sextant Necessary?

Is it essential for everybody? NO.

Is it essential for you? That depends on your feelings and decisions about how to deal with risks.

Complete loss of GPS is a low likelihood but moderate to...
Showing results 1 to 9 of 9

 
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