Sorry Jeff,

It seems I also missed much of the earlier thread.

I was agreeing with the point that thick fog is not the only type of
restricted visibility.

Now that I have discovered a bit more about the original thread, I should
perhaps add a couple of points;

First Point:

Rule 19 Very definitely applies to all vessels at sea by virtue of Rule 1
(Application)

'(a) These Rules shall apply to all vessels upon the high seas and in all
waters connected therewith navigable by seagoing vessels'


Second Point:

Did Neal really claim that you don't get wind in fog?
He perhaps needs to understand the process by which sea-fog is formed. It
happens when warm, wet air comes into contact with a sea that is colder than
it's own dew point. The only way sea fog disperses is 'normally' with a
change in wind direction which brings in dry air which is able to absorb the
moisture in the fog. Continued wind from the same direction merely feeds
more moisture, and thus, more fog! If the same wind direction continues for
long enough - the fog gets thicker and thicker.

I have certainly been in situations where I have been sailing in thick fog.
I find it safer than motoring because you can hear other vessels sound
signals much easier than with an engine on.

Sorry to bore everyone with this pedantry, but I lecture in both COLREGS and
Meteorology amongst other things.





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