Cruisers Forum
 

Go Back   Cruisers & Sailing Forums > Scuttlebutt > Challenges
Cruiser Wiki

Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 28-11-2011, 17:50   #31
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,077
Images: 4
If you are intending to go somewhere specific, then no, this is not a good idea. The general concensus is that if you are trying to hit a continent its probably doable and you could nail it or be 750 miles off.

No one has mentioned significant coastal currents yet. If sailing from Hawaii to LA without a position fix and sailing a steady heading you might have to aim at Seattle lest you end up in Ensenada.

Otoh given enough food and water you could just be out there drifitng for a while ala the 1000 days at sea guy. Hit a landfall anywhere by accident and call it a victory - LOL
__________________

__________________
Dan - Relax Lah! - On the hard @ CSC, Singapore
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 29-11-2011, 12:49   #32
Registered User
 
capn_billl's Avatar

Join Date: Aug 2010
Location: Houston,Tx
Boat: Aquarius 23'
Posts: 1,556
Re: Voyaging with ZERO navigation tools - how risky?

Quote:
Originally Posted by David_Old_Jersey View Post
Looking forward to the Satellite launches
Uh receiver

But if you can get your hands on an atomic clock, I know a guy who works for NASA, ....(well used to work )
Attached Images
File Type: bmp ScreenHunter_54.bmp (272.2 KB, 15 views)
__________________

__________________
capn_billl is offline   Reply With Quote
Old 29-11-2011, 16:38   #33
Registered User
 
ADMPRTR's Avatar

Join Date: Jan 2011
Location: Georgian Bay, Ontario, Canada
Boat: CS36 Traditional
Posts: 551
Re: Voyaging with ZERO Navigation Tools - How Risky ?

Heading towards a continent is one thing, what about inland and coastal cruising? I once read of a sailor who used road maps as his nautical charts although I don't know if he had a compass.
__________________
s/v Scoundrel
One is attracted to a scoundrel despite reservations to the contrary.
ADMPRTR is offline   Reply With Quote
Old 02-12-2011, 09:13   #34
Registered User
 
defever's Avatar

Join Date: Aug 2008
Location: wherever the boat is---from central amer to canada....so far...
Boat: defever trawler 41-nomad
Posts: 192
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

all these folks are pikers compared w/ this fella
Atom Voyages | One With The Oceans - Sailing Across the Pacific by Dugout Canoe
__________________
defever is offline   Reply With Quote
Old 02-12-2011, 16:46   #35
Senior Cruiser
 
newt's Avatar

Cruisers Forum Supporter

Join Date: Oct 2008
Location: Warrenton, Oregon
Boat: Valiant 40
Posts: 3,245
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

I liked the guy in Adrift. Navigated in a lifeboat with 3 pencils as a Austrolaube did DR close enough to know when to expect land. Pretty class act.
__________________
The taste of wisdom is first bitter, then sweeter than honey.
blog at http://fromnewt.blogspot.com/
newt is offline   Reply With Quote
Old 02-12-2011, 17:08   #36
CF Adviser

Cruisers Forum Supporter

Join Date: Aug 2009
Boat: Custom Van De Stadt 47 Samoa
Posts: 2,491
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

Quote:
Originally Posted by newt View Post
I liked the guy in Adrift. Navigated in a lifeboat with 3 pencils as a Austrolaube did DR close enough to know when to expect land. Pretty class act.
I have not read that book in years - do you remember how he actually navigate using the astrolabe? Did he have celestial tables? Did he have a way to get UTC? Did he have charts?

The key for predicting when to look for land on that drift would have been to know longitude as you are heading toward an almost N/S island chain where you can mostly see from one island to the next.

To DR that you need a good estimate of speed (thru the water) and current, and a chart (or a good memory about the longitude of the islands), and probably a celestial way to correct/update the longitude every once in a while so the DR errors don't build up to much. If you had a decent source of UT time (or you knew the rate of your watch, which he might well have) you could probably do that accurately enough by timing sunset/noon/sunrise.
__________________
www.bethandevans.com
estarzinger is offline   Reply With Quote
Old 02-12-2011, 17:48   #37
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 10,839
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

Can be done in the Atlantic easily and at low risk. Pacific, well, I would not try in my own boat. Indian perhaps similar risk to Atlantic.

But that's only the easiest voyages - crossing E to W mostly, trade wind zone.

Perhaps also the 'round the three capes' could be attempted this way. More difficult esp. at the Hoorn, methinks.

b.
__________________
barnakiel is offline   Reply With Quote
Old 02-12-2011, 17:53   #38
Registered User
 
Adelie's Avatar

Join Date: Feb 2010
Location: El Ciudad del Mission San Diego de Alcalá en Alta California, Virreinato de Nueva España
Boat: Dread Pirate Ship Radio Flyer
Posts: 1,757
Re: Voyaging with ZERO navigation tools - how risky?

Quote:
Originally Posted by capn_billl View Post
What if like me, (electronics engineer for Texas Instruments), you actually are capable of building a GPS unit?
That gives you your Lat/Lon but will not tell you where you are relative to thin water.
__________________
A house is but a boat so poorly built and so firmly run aground no one would think to try and refloat it.
SailboatData
Adelie is offline   Reply With Quote
Old 04-12-2011, 08:37   #39
Registered User

Join Date: Aug 2011
Location: North carolina
Boat: 22' pop top catlina and 15' designers choice
Posts: 48
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

a few food for thought . We talk about the old time sailors and no super gizmos on their boats to help get from point a to b. I scuba dive ALOT of wrecks off the east coast and well. Seems there were ALOT of failures as well as success's. Ol chris was sailing for spice islands when he hit the Caribbean. wait he was sailing dead west how did he hit the carrib? I think they did alot of poking and guessing. Sure they got here sooner or later and well sometimes never. I can bet anyone of us in our car can hit oh say .. Canada or Mexico or may be new york by dead reckoning. But to hit englehard, nc by dead reckoning. bah your ganna miss my town my a country mile. If you look at alot of maps you can see chains of islands you can follow to get you roughly where you intend to go. As to the fella useing a road map for coastal boating sure you can .. silly as hell but you can. You sail down the coast and almost EVERY coastal town has a water tower with their name printed on it .. Kitty hawk .... Nags head... so read the water towers and know about where you are. But that don't tell you about little under water troubles.
__________________
Wishinforwind is offline   Reply With Quote
Old 04-12-2011, 08:59   #40
cruiser
 
sailorboy1's Avatar

Join Date: Jul 2007
Location: Northeast
Boat: 43' sloop
Posts: 8,522
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

Quote:
Originally Posted by David_Old_Jersey View Post

Using only what you already know how to do / how to build and use - would you / could you set off on a transocean voyage? from home port to landfall somewhere that was secure (i.e. 10 miles out don't count as "arrived" ).

.
NO, and I'm willing to admit that I'm not explorer willing to risk all.
__________________
sailorboy1 is offline   Reply With Quote
Old 04-12-2011, 12:12   #41
Registered User

Join Date: Jan 2009
Location: Holland, France
Boat: 33ft sloop
Posts: 1,089
Images: 5
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

I did. In 1992. My first trip over the Biscaya. Definitely not my first over any rough sea.
What we had was a not working Decca and the remaining instrument was only a Walker log on a long line out board. Counting distance and speed. No more.

Did it hinder us? No. My friend, the boat owner was a -once- well known actor, at that time w/o resources and no money to buy sufficient equipment.
Nobody wanted to join him and I took the challenge.
The boat was even worse. The best she did in speed was a mere 5 knots. Ferrocement and about 3000 kgs too heavy.
I had bought, although 2nd hand, all the navigation charts. A lot. I arrived spot on in Falmouth. Spot on in La Coruna. And I loved it. Any single day.
__________________
MacG is offline   Reply With Quote
Old 04-12-2011, 12:54   #42
Registered User

Join Date: Oct 2006
Location: Nanaimo, BC
Boat: C&C 41
Posts: 215
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

Some years ago, I read about a guy that sailed an open boat from San Francisco to Tahiti with nothing but a plumb bob. He memorized the locations of the stars and their movement and just lay down on the bottom of the boat and sighted up the plumb line to fix his location relative to the stars. He made it. My head does not work that well!
__________________
Rex Delay is offline   Reply With Quote
Old 04-12-2011, 13:06   #43
Registered User

Join Date: Jan 2009
Location: Holland, France
Boat: 33ft sloop
Posts: 1,089
Images: 5
Re: Challenge: Voyaging with ZERO Navigation Tools - How Risky ?

Another guy just followed the navlights of the airliners that went to Tahiti.
Navigation in open sea is not that challenging. Don' t test your luck in tricky waters like around the Channel Islands. You can do that with local knowledge but never as a stranger.
__________________
MacG is offline   Reply With Quote
Old 05-12-2011, 07:43   #44
Registered User
 
capn_billl's Avatar

Join Date: Aug 2010
Location: Houston,Tx
Boat: Aquarius 23'
Posts: 1,556
Re: Voyaging with ZERO navigation tools - how risky?

Quote:
Originally Posted by Adelie View Post
That gives you your Lat/Lon but will not tell you where you are relative to thin water.
You wouldn't want to leave deep water until you've found a marked channel, (with prememorised lat & lon).

Before the handy chart plotters, and depth finders, "sounders" were in frequent use. Basically two guys with plumb bobs hanging on the bow, calling the fathoms. I use a long fiberglass rod, (if it touches it's too shallow), even with depth finder, (stern mount), that usually warns that I just went aground.
__________________
capn_billl is offline   Reply With Quote
Old 05-12-2011, 07:55   #45
Ordinary Seaman.. kinda.. :D
 
boatman61's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: Jan 2010
Location: Portugal... W. Coast
Posts: 14,174
Images: 2
Send a message via Skype™ to boatman61
pirate Re: Voyaging with ZERO Navigation Tools - How Risky ?

Quote:
Originally Posted by ADMPRTR View Post
Heading towards a continent is one thing, what about inland and coastal cruising? I once read of a sailor who used road maps as his nautical charts although I don't know if he had a compass.
LOL..... we had one of those in the UK.... figured if he came outa the Thames and kept the land to his right he'd reach Brighton in no time....
He went round the Isle of Dogs (If memory serves) over 5 times before running out of fuel....
__________________
"You're not drunk if you can lie on the floor without holding on." Dean Martin
"Life is far too important a thing ever to talk seriously about...." Oscar Wilde

boatman61 is offline   Reply With Quote
Reply

Tags
navigation

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
iPad Route Navigation Cotemar Navigation 3 05-05-2011 07:25


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:27.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.