One of the tests involves sitting at the chart table, with the ports blacked
out, and predicting your position to within a few metres.

In other words, you have to sail (and navigate) the boat "blind".


Interesting, what if any inputs do you get?

Shen

"Shen44" wrote in message
...

One of the tests involves sitting at the chart table, with the ports
blacked
out, and predicting your position to within a few metres.

In other words, you have to sail (and navigate) the boat "blind".


Interesting, what if any inputs do you get?


Not much. ... The slapping of the waves on the hull??

Regards


Donal
--

"Donal" wrote in message
...

"Shen44" wrote in message
...

One of the tests involves sitting at the chart table, with the ports
blacked
out, and predicting your position to within a few metres.

In other words, you have to sail (and navigate) the boat "blind".


Interesting, what if any inputs do you get?


Not much. ... The slapping of the waves on the hull??


And the eTrex in his pocket.

"Jeff Morris" wrote in message
...
"Donal" wrote in message
...

"Shen44" wrote in message
...

One of the tests involves sitting at the chart table, with the ports
blacked
out, and predicting your position to within a few metres.

In other words, you have to sail (and navigate) the boat "blind".


Interesting, what if any inputs do you get?


Not much. ... The slapping of the waves on the hull??


And the eTrex in his pocket.

Awww, c'mon!!!!




Regards


Donal
--

Subject: And ???????
From: "Donal"
Date: 12/24/2003 04:16 Pacific Standard Time
Message-id:


"Shen44" wrote in message
...

One of the tests involves sitting at the chart table, with the ports
blacked
out, and predicting your position to within a few metres.

In other words, you have to sail (and navigate) the boat "blind".


Interesting, what if any inputs do you get?


Not much. ... The slapping of the waves on the hull??

Regards


Donal
--
Actually, it was a serious question .... I'd be curious as to what the
parameters of the exam were.

Shen

"Shen44" wrote in message
...
Subject: And ???????
From: "Donal"
Date: 12/24/2003 04:16 Pacific Standard Time
Message-id:


"Shen44" wrote in message
...

One of the tests involves sitting at the chart table, with the ports
blacked
out, and predicting your position to within a few metres.

In other words, you have to sail (and navigate) the boat "blind".


Interesting, what if any inputs do you get?


Not much. ... The slapping of the waves on the hull??


Actually, it was a serious question .... I'd be curious as to what the
parameters of the exam were.

My answer was also fairly serious.

You sit at the chart table, give directions to the crew, and you have to
estimate your position after 1/2 an hour, or so.

I'm sure that you may ask the helmsman to confirm the compass reading, but
apart from that you have no feedback.

I don't know what accuracy is required to obtain a pass. I suspect that
the examiner takes the conditions into account.

Regards


Donal
--

Subject: And ???????
From: "Donal"


My answer was also fairly serious.

You sit at the chart table, give directions to the crew, and you have to
estimate your position after 1/2 an hour, or so.

I'm sure that you may ask the helmsman to confirm the compass reading, but
apart from that you have no feedback.

I don't know what accuracy is required to obtain a pass. I suspect that
the examiner takes the conditions into account.

Regards


Donal

Ouch! If you have to guess wind, currents, vessel speeds, set and drift, with
no inputs of any kind, this would indeed be difficult to do with any degree of
accuracy.

Shen

"Shen44" wrote in message ...
Subject: And ???????
From: "Donal"


My answer was also fairly serious.

You sit at the chart table, give directions to the crew, and you have to
estimate your position after 1/2 an hour, or so.

I'm sure that you may ask the helmsman to confirm the compass reading, but
apart from that you have no feedback.

I don't know what accuracy is required to obtain a pass. I suspect that
the examiner takes the conditions into account.

Regards


Donal

Ouch! If you have to guess wind, currents, vessel speeds, set and drift, with
no inputs of any kind, this would indeed be difficult to do with any degree of
accuracy.


It's called 'extrapolation' (look it up!). It's obvious
you have never exercised your brain and extrapolated
anything. This is a talent that is highly developed in
a real sailboat skipper. A small sailboat almost becomes
like an arm or a leg. It becomes an extension of one's
body and one can use input from the way it moves,
the heel, the roll, the sound of the water past the
hull, the sound of the wind, etc. to extrapolate
course and speed. If done regularly it becomes
second nature. Most any competent sailboat skipper
can do dead reckoning for long periods of time
using nothing but his senses even if he is below
most of the time.

I once deduced my course so accurately and
made corrections as I went along only by
dead reckoning alone that after a passage of
18 hours from Beaufort N.C. I dead-centered
the ship channel through Frying Pan Shoals at
dawn - came close to hitting the sea buoy as a
matter of fact after ducking below to make
coffee and emerging to look over the bow at
it.

This is a talent NEVER developed by those who
sit isolated in a pilot house on the bridge.

S.Simon

Simple Simon wrote:

This is a talent NEVER developed by those who
sit isolated in a pilot house on the bridge.


Nil, what are you doing in a thread labeled "Professional Courtesy and
Respect?"

As your last post clearly shows, you are not a professional, you exhibit
no signs of courtesy, and you certainly have not earned the respect of
any professional mariner.

You are an occasionally amusing irritant to those who seek nautical
information in this forum, otherwise you are nothing but a partially
skilled amateur, nibbling, like a parrotfish, at the reef of skills and
knowledge you will never digest.

Rick

Subject: And ???????
From: "Simple Simon"



It's called 'extrapolation' (look it up!). It's obvious
you have never exercised your brain and extrapolated
anything. This is a talent that is highly developed in
a real sailboat skipper. A small sailboat almost becomes
like an arm or a leg. It becomes an extension of one's
body and one can use input from the way it moves,
the heel, the roll, the sound of the water past the
hull, the sound of the wind, etc. to extrapolate
course and speed. If done regularly it becomes
second nature. Most any competent sailboat skipper
can do dead reckoning for long periods of time
using nothing but his senses even if he is below
most of the time.

From what I understood Donal to say, the person taking the test, is in an
enclosed space with no visual references and possibly muted noise, for the
entire time ..... not at all what you are describing.
What you describe is normal DR-ing, done by all, whether it be power, sail,
open cockpit or closed wheelhouse.

I once deduced my course so accurately and
made corrections as I went along only by
dead reckoning alone that after a passage of
18 hours from Beaufort N.C. I dead-centered
the ship channel through Frying Pan Shoals at
dawn - came close to hitting the sea buoy as a
matter of fact after ducking below to make
coffee and emerging to look over the bow at
it.

This is a talent NEVER developed by those who
sit isolated in a pilot house on the bridge.

S.Simon

G Once again, your lack of experience is showing. It's still and continues to
be obvious, that you have no conception of what goes on, onboard any type of
vessel, other than your own, and that you have little ability to relate that
experience to other circumstances, other than your own.

Shen