Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 02-08-2020, 08:26   #46
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,059
Re: Considering ditching electronics and navigating the "old" way

There is also this small sextant as described here:


https://www.yrvind.com/bris-mini-sextant/


Only one inch large and accurate too. Good emergency and good learning tool.


Can be built onboard during a rainy weekend ... waiting for the Sun.



barnakiel
barnakiel is offline   Reply With Quote
Old 03-08-2020, 05:59   #47
Registered User

Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 4,037
Images: 7
Re: Considering ditching electronics and navigating the "old" way

Quote:
Originally Posted by rslifkin View Post
With electronics, sometimes it's easy to get lost in the "ooh, that's cool" and "that would be nice to have". In reality, if you put some thought into it, you can probably come up with a fairly basic, inexpensive, easy to maintain setup that'll meet your needs (and be far more practical than not having it).


I use a cheap Lenova tablet with OpenCPN and CM93 charts for anchor watch purposes. Total about $200 and I have used the same software on a cheap 10" to navigate the 4,000 nm Australian coastal passage from the Great Sandy Straits to Exmouth and back. I already have the paper charts to do this but to buy them again now would cost in excess of $1,000.
RaymondR is online now   Reply With Quote
Old 03-08-2020, 07:54   #48
Registered User

Join Date: Jun 2018
Posts: 3
Re: Considering ditching electronics and navigating the "old" way

Anyone know where there is an iphone app that gives sextant tables for the day including mer pass for sun at greenwich,cant seem to find one?
edwinb is offline   Reply With Quote
Old 03-08-2020, 08:20   #49
Registered User
 
TeddyDiver's Avatar

Join Date: Aug 2010
Location: Arctic Ocean
Boat: Under construction 35' ketch (and +3 smaller)
Posts: 2,293
Images: 2
Re: Considering ditching electronics and navigating the "old" way

If you go old fashioned why not have an old book to guide you to celestial (and more). Get Bowditch "American Practical Navigator", it was the bible of the US navy back in the days when they didn't bump into other vessels.
TeddyDiver is offline   Reply With Quote
Old 03-08-2020, 08:26   #50
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,059
Re: Considering ditching electronics and navigating the "old" way

Quote:
Originally Posted by edwinb View Post
Anyone know where there is an iphone app that gives sextant tables for the day including mer pass for sun at greenwich,cant seem to find one?

There is an Android App. Find it on Google ten cross reference to Apple shop.


barnakiel
barnakiel is offline   Reply With Quote
Old 03-08-2020, 08:32   #51
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,059
Re: Considering ditching electronics and navigating the "old" way

Except that using digital crutches like Apps to get your almanac negates the point.


The same applies to Tamaya calculators as well as Casio ones.



You can get a printed almanac by printing pages of online alamanacs though.


It is a sextant, a clock, an almanac and a pencil exercise.



b.
barnakiel is offline   Reply With Quote
Old 03-08-2020, 11:30   #52
Registered User

Join Date: Jun 2018
Posts: 3
Re: Considering ditching electronics and navigating the "old" way

thanks for the advice- taken it

https://thenauticalalmanac.com/2020%...%20Almanac.pdf
edwinb is offline   Reply With Quote
Old 03-08-2020, 12:07   #53
Registered User
 
TeddyDiver's Avatar

Join Date: Aug 2010
Location: Arctic Ocean
Boat: Under construction 35' ketch (and +3 smaller)
Posts: 2,293
Images: 2
Re: Considering ditching electronics and navigating the "old" way

Quote:
Originally Posted by barnakiel View Post
Except that using digital crutches like Apps to get your almanac negates the point.


The same applies to Tamaya calculators as well as Casio ones.



You can get a printed almanac by printing pages of online alamanacs though.


It is a sextant, a clock, an almanac and a pencil exercise.



b.
Actually a clock and almanac suffice (well a pencil and a chart too). Except twice a year and polar areas during mid summer..
TeddyDiver is offline   Reply With Quote
Old 03-08-2020, 12:46   #54
Registered User

Join Date: Nov 2016
Location: Gulf Coast of FL
Boat: Pearson
Posts: 357
Re: Considering ditching electronics and navigating the "old" way

Its not that hard. I was taught at 9 . My dad had a swordfish harpoon boat, charter too and he would have me plot between two dots on the chart. one where we were and one where to go. I would draw a pencil line between the dots , then with parallel rules transfer the line back to the compass rose on the chart to get the degrees to travel. Then use the dividers to measure the distance and measure that on the mileage scale on the chart. Granted not perfect, waves, tides, currents, wind all add factors, but consider them. I have traveled the gulf and the islands that way for years, still do. I was out fishing with a few friends last yr. . on his boat He had 3fish, chart plotters etc. and they were real nice. While going out I checked or asked what was our heading and got puzzled looks from him , no comment. On the return all electronics went out, no fire but burnt wire smell. The capt. filled with panic as clouds crept in was lost. I said reverse our outbound heading, which was 149-152. degrees, I opted for 304-307 degrees to return due to increased wind and waves. A hour and a half later we lined up on the entrance markers. Sitting in the bar , pouring rain, my boat drink glass was never empty. A day in the life... 😁
__________________
Ken Z
Ken Z is offline   Reply With Quote
Old 03-08-2020, 14:15   #55
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,059
Re: Considering ditching electronics and navigating the "old" way

Quote:
Originally Posted by TeddyDiver View Post
Actually a clock and almanac suffice (well a pencil and a chart too). Except twice a year and polar areas during mid summer..

You got me interested :



How do we skip the sextant thing?


I understand the chart can be skipped too when we know how to make a plotting sheet.



barnakiel
barnakiel is offline   Reply With Quote
Old 03-08-2020, 14:24   #56
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,059
Re: Considering ditching electronics and navigating the "old" way

Yes. DR is simple, until it gets difficult (I mean areas with strong tidal currents).


Celestial nav, in its simple form, is also a matter of understanding things much more than 'learning' them. It IS simple when you understand what you are doing.



Although I was taught astro nav that called for star sights, moon sights, etc. I will admit all I ever do at sea is either a noon sight or else (more frequently) a morning + afternoon sight. I move the first line by the distance sailed, in the direction sailed. Dead simple. VERY VERY simple.


In fact, in case of our boat (only 26' long and quite narrow) I would say that sight taking is far more difficult than making the calculation and then the plot.


People tend to think one pops up on the deck with a sextant and hay-ho they get a clean, well timed sight. In fact, on a small boat that rolls and pitches, this can be quite an exercise.


barnakiel
barnakiel is offline   Reply With Quote
Old 03-08-2020, 14:27   #57
Registered User

Join Date: Nov 2018
Posts: 433
Re: Considering ditching electronics and navigating the "old" way

Universal Plotting Sheets are great. If the passage is long enough to require careful plotting, its easier to do all the nav work on the plotting sheet, then periodically transfer a position to the real chart.
Bycrick is offline   Reply With Quote
Old 03-08-2020, 14:34   #58
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,059
Re: Considering ditching electronics and navigating the "old" way

I can recommend the book by George G.Bennett "The Complete On-Board Celestial Navigator".


Too bad its almanac part expired (you can roll it forward loosing some accuracy in the process though). There is no new edition I think.



But the reduction tables there are still way simpler than the classic reduction tables. Also the theory coming on the early pages is quite lucid and easy to grasp for anybody, I believe.


Somehow, though I have dropped and gave away all other astro nav books I had, I still have here the Bennett's one.


barnakiel
barnakiel is offline   Reply With Quote
Old 03-08-2020, 14:42   #59
Registered User

Join Date: Mar 2019
Posts: 769
Re: Considering ditching electronics and navigating the "old" way

Quote:
Originally Posted by TeddyDiver View Post
If you go old fashioned why not have an old book to guide you to celestial (and more). Get Bowditch "American Practical Navigator", it was the bible of the US navy back in the days when they didn't bump into other vessels.
They did run aground with what we would now consider shocking frequency though. Turns out celestial navigation does nothing to help you avoid collisions with other ships (unless I missed that part of nautical science class at the Academy?) and does a passable but not great job of telling you where you are.
redneckrob is offline   Reply With Quote
Old 03-08-2020, 16:45   #60
Registered User
 
dwedeking2's Avatar

Join Date: May 2014
Location: Key West, FL
Boat: Morgan Out Island 415
Posts: 807
Images: 1
Re: Considering ditching electronics and navigating the "old" way

When I bought my first sailboat I wrote into my budget to do a full B&G electronic system. Close to $10k if I remember correctly. I'd be able to walk around the deck controlling the boat via wireless and oh so cool. I did one small movement across town and a day sail before that boat was damaged by another boat and sold.

I bought my next boat on the other side of Florida. I used a tablet for wider view navigation, a old fashioned gps device with a small screen and an inreach device which transfered information to my phone (still a small screen). I made it from Port Charlotte to Jacksonville and realized that's all I "needed" to get somewhere.

I like old fashioned. I like non-electronic back up systems. I have paper charts and find them good for "big picture" planning. But for a $100 tablet w/ gps and $40 navionics I have all the details of the US east coast, Caribbean and some of South America. That detail of that area would be way expensive in paper charts.
In fighting corporations and "sticking it to the man" I find you can screw yourself by being too pure. Sometimes trying to hold to an ideal can cost more than just using what is best.
__________________
S/V Pomaika'i Blog
dwedeking2 is offline   Reply With Quote
Reply

Tags
electronics

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Buy a "new" old boat or an "old" old boat?? jimp1234 General Sailing Forum 29 08-01-2016 02:12
Ditching the Vang? sully75 Deck hardware: Rigging, Sails & Hoisting 33 16-11-2013 01:47
Ditching Solar Panel Frame Highland Fling Electrical: Batteries, Generators & Solar 18 15-03-2012 09:53
Navigating the 'Old Way'. . . boasun Navigation 23 15-02-2011 20:21
Ditching Tenure for the Sea ! Reba Meets & Greets 24 17-08-2010 14:05

Advertise Here


All times are GMT -7. The time now is 01:43.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.