Re: [Paddlewise] Again with the tankers! - speeds?

From: Dave Kruger <kdruger_at_pacifier.com>
Date: Sun, 11 Mar 2007 18:14:02 -0700
Derek wrote:
> What is the typical travel speed for these tankers?  I know speeds are
> posted on some charts, but they don't necessarily follow the posted
> limits.

Derek, that's a good question.  I bet it depends heavily on the nature of 
the waterway.  The narrow channels referred to in earlier posts probably 
have tighter speed restrictions than those on the Columbia River (which is 
all I know well).  Here, 15 knots is not unusual, but frequently the 
vessels slow way down when meeting opposing tankers or freighters, or when 
turning, or when going over shallower areas.  Then, they are often 
traveling at only a few knots, relative to the water.  A minimum of 4-5 
knots, I imagine.

One added complication is that we often have river/tidal currents of three 
knots or so; when a freighter is traveling with the current, to maintain 
steerageway, they still have to hold several knots of hull speed, so they 
may close on you pretty fast when the speed of the current is added on.

They are so huge, a paddler does not appreciate how fast they are moving 
until they are on him/her.

I've not had any close calls, but others have.  For us, the wakes are 
mostly fun to play in, and not a safety issue at all.

-- 
Dave Kruger
Astoria, OR
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Received on Sun Mar 11 2007 - 18:16:34 PDT

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