My seamanship question #1
 

And without knowing the speed of the two boats, this is a
dumb question.

SBV


"Capt. JG" wrote in message
...
Well, true, but she did say catching up, and I took that
to mean a possible
collision. The overtaken needs to hold his course. The one
overtaking needs
to change course, slow down, whatever.

--
"j" ganz @@
www.sailnow.com

"katy" wrote in message
...
Capt. JG wrote:
How do you figure? If one boat is being overtaken, in
this scenario,
that's pretty much the end of the story. Speed isn't an
issue.

because if the speeds were such one could conceivably
pass by the other
without any course adjustments being needed....

My seamanship question #1
 

Scotty wrote:
And without knowing the speed of the two boats, this is a
dumb question.

SBV


"Capt. JG" wrote in message
...
Well, true, but she did say catching up, and I took that
to mean a possible
collision. The overtaken needs to hold his course. The one
overtaking needs
to change course, slow down, whatever.

--
"j" ganz @@
www.sailnow.com

"katy" wrote in message
...
Capt. JG wrote:
How do you figure? If one boat is being overtaken, in
this scenario,
that's pretty much the end of the story. Speed isn't an
issue.
because if the speeds were such one could conceivably
pass by the other
without any course adjustments being needed....




I said that....

My seamanship question #1
 

Doesn't "catching up" imply that there's a situation developing?

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
And without knowing the speed of the two boats, this is a
dumb question.

SBV


"Capt. JG" wrote in message
...
Well, true, but she did say catching up, and I took that
to mean a possible
collision. The overtaken needs to hold his course. The one
overtaking needs
to change course, slow down, whatever.

--
"j" ganz @@
www.sailnow.com

"katy" wrote in message
...
Capt. JG wrote:
How do you figure? If one boat is being overtaken, in
this scenario,
that's pretty much the end of the story. Speed isn't an
issue.

because if the speeds were such one could conceivably
pass by the other
without any course adjustments being needed....

My seamanship question #1
 

No.


"Capt. JG" wrote in message
...
Doesn't "catching up" imply that there's a situation
developing?

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
And without knowing the speed of the two boats, this is
a
dumb question.

SBV


"Capt. JG" wrote in message
...
Well, true, but she did say catching up, and I took
that
to mean a possible
collision. The overtaken needs to hold his course. The
one
overtaking needs
to change course, slow down, whatever.

--
"j" ganz @@
www.sailnow.com

"katy" wrote in message
...
Capt. JG wrote:
How do you figure? If one boat is being overtaken,
in
this scenario,
that's pretty much the end of the story. Speed isn't
an
issue.

because if the speeds were such one could conceivably
pass by the other
without any course adjustments being needed....

My seamanship question #1
 

Really? When does "catching up" not mean that?

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
No.


"Capt. JG" wrote in message
...
Doesn't "catching up" imply that there's a situation
developing?

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
And without knowing the speed of the two boats, this is
a
dumb question.

SBV


"Capt. JG" wrote in message
...
Well, true, but she did say catching up, and I took
that
to mean a possible
collision. The overtaken needs to hold his course. The
one
overtaking needs
to change course, slow down, whatever.

--
"j" ganz @@
www.sailnow.com

"katy" wrote in message
...
Capt. JG wrote:
How do you figure? If one boat is being overtaken,
in
this scenario,
that's pretty much the end of the story. Speed isn't
an
issue.

because if the speeds were such one could conceivably
pass by the other
without any course adjustments being needed....

My seamanship question #1
 

"katy" wrote in message
...
Scotty wrote:
And without knowing the speed of the two boats, this is
a
dumb question.....




I said that....

I thought it sounded familiar.

My seamanship question #1
 

Lots of times.


"Capt. JG" wrote in message
...
Really? When does "catching up" not mean that?

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
No.


"Capt. JG" wrote in message
...
Doesn't "catching up" imply that there's a situation
developing?

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
And without knowing the speed of the two boats, this
is
a
dumb question.

SBV


"Capt. JG" wrote in message
...
Well, true, but she did say catching up, and I took
that
to mean a possible
collision. The overtaken needs to hold his course.
The
one
overtaking needs
to change course, slow down, whatever.

--
"j" ganz @@
www.sailnow.com

"katy" wrote in message
...
Capt. JG wrote:
How do you figure? If one boat is being
overtaken,
in
this scenario,
that's pretty much the end of the story. Speed
isn't
an
issue.

because if the speeds were such one could
conceivably
pass by the other
without any course adjustments being needed....

My seamanship question #1
 

Capt. JG wrote:
The colregs are *fully* in force when racing. The only difference is the
tolerances wrt distance and expectations.

I had the understanding that when you agreed to race you were "opting
out" of the Colregs and agreeing to abide by the racing rules. OTOH,
this obviously only applies between boats racing.

My seamanship question #1
 

The overtaking boat.

"Ellen MacArthur" wrote in message
reenews.net...
A little sailboat with no motor is on the starboard tack catching up
with another
little sailboat with no motor on the starboard tack. The one catching up
is going
on a course of 180 degrees. The one getting caught is going 208 degrees.

Which one has to change course if it looks like they're going to hit
each other?

Cheers,
Ellen

My seamanship question #1
 

On Wed, 13 Sep 2006 00:49:02 +0100, "Capt. Scumbalino"
wrote:

Goofball_star_dot_etal wrote:

"The one catching up is going on a course of 180 degrees" If they are
to converge "the direction from the beam of the vessel being
overtaken" must be less than 28 degrees.

Whether or not they converge is a function of their current positions, their
courses and their speeds. Have a look at my diagram linked to elsewhere. If
the red boat is doing 1kt, and the green one 100kts, then the green one will
be past the red one - will pass over the red boat's projected course - long
before the red boat gets to the same point.

The direction from the beam has nothing to do with convergence, but is a
means of defining whether the situation is an overtaking one.

Yes, I had a bad brain fart.
It was specified in the question that the situation to be considered
was that they would collide if both boats maintained course and speed.
("if it looks like they're going to hit each other"). Drawing vectors
back from the projected collision point you can say that the faster
("catching up"), 180 degree, boat has to be doing more than 1.45 times
the speed of the other, for it to be within the being overtaken
(white) sector of the 208 degree boat.