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From: Dave J (no email)
Date: Mon Sep 29 2003 - 11:42:04 EDT
>> From: "Grafton, John" <>
>>Subject: RE: Onboard Equipment Questions
>>And why would that happen? That is an argument that doesn't hold
water.
>>The military may reinstate SA but I doubt that will happen again.
>>regards,
>>John
===============================================
Hmmmmmm, I guess John didn't see this one.
Reference GPS being shut down, I would recommend folks look at
the national plan for SCANTNA (Security Control of Air Traffic and
Navigational Aids).
Look it up. It's real, it's useable, it's not just "doomsday" stuff.
Scantana has been around for many years and has been implemented only
a very few times, BUT it ~has~ been implemented and with the recent
events involving airborne terrorism could well be implemented more often
in the foreseeable future. It was partially implemented on 9/11.
When full SCANTANA is implemented ~all~ aviation related navaids in the
country are shut down to preclude their use by possible enemy or
terrorist activities.
Civil Aviation is thereby pretty much grounded for the period.
Systems shut down under SCANTANA include, among others, LORAN,
VOR, TACAN, NDB, and yes, now - GPS. All are systems that aviators
use to navigate their aircraft. More and more aircraft use GPS every
day. It's more convenient and accurate than many of the older systems.
My advice, keep the sextant (grin). Even when using "dead reckoning"
one often needs to input course adjustments.
Dave J
A CAP pilot who has to study how to operate under SCANTANA
and, yes, a sailor.
===================================================
Dave J
----- Original Message -----
From: <>
To: <>
Sent: Monday, September 29, 2003 06:28
Subject: [world-cruising] Digest Number 192
To unsubscribe from this group, send an email to:
------------------------------------------------------------------------
There are 9 messages in this issue.
Topics in this digest:
1. Re: Capetown to Freemantle
From: "Barry Brazier" <>
2. re: taffrail log
From: B Geres <>
3. taffrail logs
From: "christina" <>
4. Re: taffrail logs
From: "Barry Brazier" <>
5. know these designers
From: "Barry Brazier" <>
6. where can I find someone competent to calibrate a sextant ?
From: Courtney Thomas <>
7. RE: where can I find someone competent to calibrate a sextant ?
From: "Rick H Kennerly" <>
8. RE: Capetown to Freemantle
From: Ian <>
9. RE: Onboard Equipment Questions
From: "Grafton, John" <>
________________________________________________________________________
________________________________________________________________________
Message: 1
Date: Sun, 28 Sep 2003 22:23:41 +1000
From: "Barry Brazier" <>
Subject: Re: Capetown to Freemantle
Hi Ian
I am thinking of buying in South Africa and sailing home to Oz.
What type of boat did you get and how did you locate it
Barry
----- Original Message -----
From: Ian
To:
Sent: Sunday, September 28, 2003 7:29 AM
Subject: [world-cruising] Capetown to Freemantle
Hi John,
You were going to get back to me re sailing this route January
/February. We
were thinking of not going below 35 and wondering if you have any
recommendations on a possible route.
Regards, Ian & Suzy
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[Non-text portions of this message have been removed]
________________________________________________________________________
________________________________________________________________________
Message: 2
Date: Sun, 28 Sep 2003 07:32:33 -0700 (PDT)
From: B Geres <>
Subject: re: taffrail log
These folks can usually find (and recondition) logs
and sextants for use/display:
Robert E. White Instruments, Inc.
711 Atlantic Avenue
Boston, MA 02111
Tel: 800-992-3045 (U.S./Canada)
Tel: 617-482-8460 (Eastern MA)
Fax: 617-482-8304
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________________________________________________________________________
________________________________________________________________________
Message: 3
Date: Sun, 28 Sep 2003 15:15:55 -0000
From: "christina" <>
Subject: taffrail logs
i have seen dozens of taffrail logs for sale in second hand marine
stores. when you buy one new, it usually comes with more than one
¨fish.¨ the ones for sale in second hand stores usually only have one
fish, the reason, they make great fishing lures. in other words, a
large fish can eat your speed meter. a chip log may be a good
alternative, measuring as accurately as possible the time it takes to
pass a chip of wood from bow to stern, then doing the math to figure
out your boat speed. there´s a formula for that but i dont know it.
does anyone have that formula?
that would be something good to know.
however, i think it is important o note that both these methods
measure speed through the water and dont take into consideration the
current which can make a substantial difference in some places.
chrissi, trimaran naga
________________________________________________________________________
________________________________________________________________________
Message: 4
Date: Mon, 29 Sep 2003 09:57:26 +1000
From: "Barry Brazier" <>
Subject: Re: taffrail logs
Has any one heard of boat designers named
Andres Maritz and Roberto Benino
They have designed an aluminium sloop
Barry
----- Original Message -----
From: christina
To:
Sent: Monday, September 29, 2003 1:15 AM
Subject: [world-cruising] taffrail logs
i have seen dozens of taffrail logs for sale in second hand marine
stores. when you buy one new, it usually comes with more than one
¨fish.¨ the ones for sale in second hand stores usually only have one
fish, the reason, they make great fishing lures. in other words, a
large fish can eat your speed meter. a chip log may be a good
alternative, measuring as accurately as possible the time it takes to
pass a chip of wood from bow to stern, then doing the math to figure
out your boat speed. there´s a formula for that but i dont know it.
does anyone have that formula?
that would be something good to know.
however, i think it is important o note that both these methods
measure speed through the water and dont take into consideration the
current which can make a substantial difference in some places.
chrissi, trimaran naga
Yahoo! Groups Sponsor
ADVERTISEMENT
To unsubscribe from this group, send an email to:
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed]
________________________________________________________________________
________________________________________________________________________
Message: 5
Date: Mon, 29 Sep 2003 10:02:24 +1000
From: "Barry Brazier" <>
Subject: know these designers
Has any one heard of boat designers named
Andres Maritz and Roberto Benino
They have designed an aluminium sloop
[Non-text portions of this message have been removed]
________________________________________________________________________
________________________________________________________________________
Message: 6
Date: Sun, 28 Sep 2003 21:12:55 -0500
From: Courtney Thomas <>
Subject: where can I find someone competent to calibrate a sextant ?
Thank you,
-- Courtney Thomas s/v Mutiny lying Oriental, NC ________________________________________________________________________ ________________________________________________________________________ Message: 7 Date: Mon, 29 Sep 2003 06:33:56 -0400 From: "Rick H Kennerly" <> Subject: RE: where can I find someone competent to calibrate a sextant ? What exactly do you mean "calibrate"? Sextants come with full adjustments, even the cheap plastic ones. The Sextant Handbook will fill you in. Besides, if you ever drop it at sea, you need to be able to get it back into square. Rick NH2F Westsail 32 Xapic Cabo San Juan, Puerto Rico www.mouseherder.com/xapic/sleep.html www.westsail.org Sail like a Kiwi Anchor like a Canadian Live like a Texan .:.-----Original Message----- .:.From: Courtney Thomas [mailto:] .:.Sent: Sunday, September 28, 2003 22:13 .:.To: .:.Subject: [world-cruising] where can I find someone competent to .:.calibrate a sextant ? .:. .:. .:.Thank you, .:.-- .:.Courtney Thomas .:.s/v Mutiny .:.lying Oriental, NC .:. .:. .:. .:.To unsubscribe from this group, send an email to: .:. .:. .:. .:. .:.Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ ________________________________________________________________________ ________________________________________________________________________ Message: 8 Date: Mon, 29 Sep 2003 20:33:26 +1000 From: Ian <> Subject: RE: Capetown to Freemantle Hi Barry, What part of OZ do you live in? Ian ________________________________________________________________________ ________________________________________________________________________ Message: 9 Date: Mon, 29 Sep 2003 07:37:49 -0500 From: "Grafton, John" <> Subject: RE: Onboard Equipment Questions And why would that happen? That is an argument that doesn't hold water. The military may reinstate SA but I doubt that will happen again. regards, John > And what will you do, when the GPS system shuts down? > > Alan MacBride and/or Lisa Schallert wrote: > No sextant. GPS's, a boxful of them if necessary, to equal > the price of an ASTRA IIIB+box+ephemeris. > > > > Yahoo! Groups Sponsor > ADVERTISEMENT > click here > <http://rd.yahoo.com/M=194081.3897168.5135684.1261774/D=egroupweb/S=1705 06 > 5792:HM/A=1754016/R=0/SIG=11pv1u2ju/*http://www.ediets.com/start.cfm?cod e= > 30529&media=atkins> > > <http://us.adserver.yahoo.com/l?M=194081.3897168.5135684.1261774/D=egrou pm > ail/S=:HM/A=1754016/rand=591972279> > > To unsubscribe from this group, send an email to: > > > > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service > <http://docs.yahoo.com/info/terms/>. ________________________________________________________________________ ________________________________________________________________________ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/A1TolB/TM ---------------------------------------------------------------------~-> To unsubscribe from this group, send an email to: Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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