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Search took 0.00 seconds. Search: Posts Made By: Dockhead
Forum: Navigation 07-09-2017, 08:44
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Agreeing with Evans and Stu --

What's the point of doing DR by hand, if you have valid GPS data? And why is this "real navigation", and correctly using GPS data is not?

I still do a lot of...
Forum: Navigation 05-09-2017, 16:05
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

If you say so. I haven't done it; you have. But what you say sounds plausible to me.

My trips through the North Sea and Baltic are fiendishly complicated to plan. I guess it requires a hundred...
Forum: Navigation 05-09-2017, 13:30
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

You either did not read, or did not understand, what Evans wrote about the "triage of focus and attention". I have the distinct impression that these opinions are formulated theoretically and...
Forum: Navigation 05-09-2017, 11:20
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Last time you crossed an ocean, did you check the chart for the whole ocean? Did you catch Evans' remark about his XTE? It may be that there wasn't even anything wrong with his planning -- just...
Forum: Navigation 05-09-2017, 06:33
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

He screwed up big time -- I think we can all agree about that. I also looked at my CM93 charts and can confirm what others have posted -- that the reef is visible even at pretty low zoom levels.
...
Forum: Navigation 05-09-2017, 05:41
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Naturally not, and I didn't say that it was.

Keeping charts up to date as required on a commercial vessel is necessary, just like checking through your route zoomed in is necessary, to avoid...
Forum: Navigation 05-09-2017, 04:03
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Not a red herring at all -- the purpose of passage planning is to MANAGE RISKS. They are exactly risks -- not certain events. We all use luck -- the whole trick is to reduce our reliance on it. ...
Forum: Navigation 05-09-2017, 04:01
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Not a red herring at all -- the purpose of passage planning is to MANAGE RISKS. They are exactly risks -- not certain events. We all use luck -- the whole trick is to reduce our reliance on it. ...
Forum: Navigation 05-09-2017, 03:23
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Congratulations! And I have no doubt that a large measure of this success is down to your being a very good, very skilled, and very diligent navigator.

But how many reefs or shoals or floating...
Forum: Navigation 05-09-2017, 03:18
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

That's a good attitude, and a good start.

But I don't know any experienced ocean skipper who is not "suspicious of danger" and who does not "go looking for it". The problem is that the danger in...
Forum: Navigation 05-09-2017, 03:09
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

So I guess it could never happen to you, either? :facepalm:

OK, if a "million" is hyperbolic -- there are at least dozens of things to think about, if not hundreds, and that is not an...
Forum: Navigation 05-09-2017, 02:00
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

This is extremely unfair.

Yes, he failed, but what makes you think it was "laziness"? Have you ever crossed an ocean, or even skippered a multiday passage? There are a million things to do, and...
Forum: Navigation 04-09-2017, 04:54
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

This is an absolutely typical feature of vector charts. Looky: https://www.cruisersforum.com/forums/f134/the-electronic-charting-zoom-problem-140632.html


Raster charts don't suffer from this...
Forum: Navigation 04-09-2017, 04:47
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Indeed!!
Forum: Navigation 04-09-2017, 04:45
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Ah, that's somewhat different!

Paper won't give you the fatally misleading impression that you get from vector charts zoomed out to the wrong scale. So you're way ahead, if paper is your primary...
Forum: Navigation 03-09-2017, 15:14
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

Which could never happen to you, of course.
Forum: Navigation 03-09-2017, 08:50
Replies: 91
Views: 10,620
Posted By Dockhead
Re: Not another one?

We discussed it in this thread:

https://www.cruisersforum.com/forums/f134/the-electronic-charting-zoom-problem-140632.html


There but for the grace of God go I. Using vector charts for passage...
Showing results 1 to 17 of 17

 
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