GPS Backup with a Mark 3 Sextant: All Instructions and Tables Included

GPS Backup with a Mark 3 Sextant: All Instructions and Tables Included
Retail price: $22.45
$19.95
Discount: $2.50 (11%)
STR049
Add to Favorites
Our guiding principle for this booklet was to provide a means of learning and executing a position fix at sea when a vessel has run out of power and all the batteries have been consumed, so there is no GPS available. We wanted a solution that is compact and inexpensive, using tables and procedures that are easy to learn and use. This goal led to our proposing a minimum kit that mariners would not hesitate to add to their gear to cover the unlikely situation it would actually be needed. Mariners who cross oceans in small boats realize they must be self-reliant and cover all contingencies.

For those who do not have the chance to learn the full range of celestial navigation before departure, this booklet and a Mark 3 sextant provide a minimum backup kit that can be used to navigate across any ocean if needed. 

This book includes a 60-page Almanac of the sun to provide quick and easy solutions for Latitude and Longitude, as well as a unique new method for finding the corrections needed to find Latitude by Polaris, as well as in depth discussion of how to use a Mark 3 plastic sextant with emphasis on reading the angle scales.

Contents
1. OVERVIEW 
2. SEXTANT SIGHTS WITH THE MARK 3 SEXTANT
     Reading the Sextant Scales 
     Adjusting the Index Mirror
     Index Mirror Adjustment Using Only a Sea Horizon
     Index Mirror Adjustment with a Star 
     Index Mirror Adjustment with Cloud Edges
3. TAKING SUN SIGHTS
     Aligning the Sun on the Horizon
4. A COOKBOOK APPROACH TO FINDING POSITION 
     Correcting the Sextant Height to get the Observed Height
     Finding Latitude and Longitude From the Sun
     The Recipe
     Finding the Peak Height of the Sun
     Finding the Time of LAN
     Sailing Under the Sun
5. WORKED LAN EXAMPLES
     Latitude Example 1
     Easy LAN Rule
     Longitude Example 1 
     Latitude Example 2
     Longitude Example 2
6. LATITUDE BY POLARIS
     Latitude by Polaris Example
7. PLOTTING POSITIONS AND DR TRACKS
     Setting Up a Universal Plotting Sheet 
     Using the Plotting Sheet 
     Getting by Without Dividers 
8. BACKGROUND INFORMATION 
     8.1 Timekeeping in Navigation 
     8.2 Lat, Lon, nmi, and DR
     8.3 Adjusting the Index Mirror on Land 
     8.4 Predicting the Time of LAN From Your DR-Lon
     8.5 Principles of the Noon Sight for Lat and Lon 
     8.6 Universal Rule for LAN
9. GPS BACKUP KIT--THEME AND VARIATIONS
10. REFERENCES
11. TABLES
     Sun Almanac
     Refraction Table, Dip Table, Polaris Table
     Increments Table

Specifications

Format:
Paperback
Author:
David Burch
Pages:
98 pages
Dimensions (IN):
6 x 9
ISBN:
9780914025603
Supplier/Publisher:
Starpath
Date Added:
August 2018
Published Date:
2018

Material Options

PAPER CHARTS

Our paper charts are printed on high resolution, heavyweight, water-resistant paper, using state of the art printing technology. The paper and printing process has been certified by NOAA and deemed to be suitable to withstand the rigors of use in the marine environment.

FULL SIZED PAPER CHARTS ARE CERTIFIED FOR CARRIAGE ABOARD COMMERCIAL VESSELS		 WATERPROOF CHARTS

Our waterproof charts are printed on a
very durable, extremely tear resistant,
waterproof material using state of the art
printing technology. The waterproof
material accepts pencil markings well and
also erases well. The paper and printing process has been certified by NOAA and deemed to be suitable to withstand the
rigors of use in the marine environment.

TIP: If you plan to frame or laminate a chart using heat, then do not choose waterproof because the material can melt under heat.

FULL SIZED WATERPROOF CHARTS ARE CERTIFIED FOR CARRIAGE ABOARD COMMERCIAL VESSELS

 Size Options

  

SMALL FORMAT CHARTS
These are up-to-date, NOAA charts simply
reduced in size so that the small dimension of the chart is 21”, the long dimension is proportionally reduced. These charts are not printed to full size, therefore the scale is not the same as the full size NOAA chart, however the scale bars on the charts are proportionally reduced in size, and can be used for reference. These charts are not recommended for navigation.

SMALL FORMAT CHARTS ARE NOT CERTIFIED FOR CARRIAGE ABOARD COMMERCIAL VESSELS
These are up-to-date, NOAA charts simply enlarged in size so that the small dimension of the chart is 42”, the long dimension is proportionally enlarged. These charts are printed beyond full size, therefore the scale is not the same as the full size NOAA chart, however the scale bars on the charts are proportionally enlarged in size, and can be used for reference.

LARGE FORMAT CHARTS ARE NOT CERTIFIED FOR CARRIAGE ABOARD COMMERCIAL VESSELS

Other Options

  

BOOKLET CHARTS

Made to help recreational boaters locate themselves on the water. It has been reduced in scale for convenience, but otherwise contains all the information of the full-scale nautical chart. The bar scales have also been reduced, and are accurate when used to measure distances in these BookletCharts.

• Professionally printed and staple-bound using high quality, durable paper.

• Includes Notices to Mariners

• Printed on-demand with the latest data from NOAA

BOOKLET CHARTS ARE NOT CERTIFIED FOR CARRIAGE ABOARD COMMERCIAL VESSELS

DECORATIVE ANTIQUED CHARTS

This is a unique line of decorative charts prepared by Paradise Cay Publications.

  • This is an art piece prepared with the look of a well-used chart with the patina of antique parchment.
  • Printed on our high-quality heavy paper.
  • We have added an additional border to allow for framing.
  • Shipped rolled, never folded.

The short side of the chart is always printed at 36" and the long side will vary depending on the chart - please do not order framing prior to receiving the chart. These will memorialize your favorite coastal area in vintage style and we have added to the standard border of the typical NOAA chart to allow for a more professional, frame-ready presentation.

DECORATIVE CHARTS ARE NOT CERTIFIED FOR CARRIAGE ABOARD COMMERCIAL VESSELS