Press "Enter" to skip to content

American Practical Navigator by N. Bowditch PDF

By N. Bowditch

Show description

Read Online or Download American Practical Navigator PDF

Best outdoor recreation books

Cuchillos Muela by PDF

Каталог ножей испанской фирмы Muela. Текст практически отсутствует, поэтому незнание аборигенского языка не помешает получить вам массу эстетического удовольствия. :)

Download PDF by Mr. Mors Kochanski: Basic Safe Travel and Boreal Survival Handbook: Gems from

"Basic secure shuttle and Boreal Survival instruction manual" was once compiled for outside educators and the Junior woodland Warden move usually from articles initially released in "Wilderness Arts and game journal" that had turn into out of print yet a lot wanted. a few of the articles have been the root for Kochanski's "Bushcraft".

Get Lofting a Boat A step-by-step manual (Adlard Coles Classic PDF

The second one booklet in our vintage Boat sequence aimed toward conventional boat enthusiasts, developers and restorers. Lofting is a necessary degree within the transition among designing and development a ship for you to flip the layout plans into boat traces plans to degree off and construct the significant boat. Its a difficult artwork, yet this booklet indicates precisely the way it is finished in transparent, step by step diagrammatic levels.

Additional info for American Practical Navigator

Example text

Traditional nautical charts have been printed on paper. Electronic charts consisting of a digital data base and a display system are in use and will eventually replace paper charts for operational use. An electronic chart is not simply a digital version of a paper chart; it introduces a new navigation methodology with capabilities and limitations very different from paper charts. The electronic chart will eventually become the legal equivalent of the paper chart when approved by the International Maritime Organization and the various governmental agencies which regulate navigation.

Local authorities should be consulted for the controlling depth. NOS Charts frequently show controlling depths in a table, which is kept current by the Notice to Mariners. The chart scale is generally too small to permit all soundings to be shown. In the selection of soundings, least depths are shown first. This conservative sounding pattern provides safety and ensures an uncluttered chart appearance. Steep changes in depth may be indicated by more dense soundings in the area. The limits of shoal water indicated on the chart may be in error, and nearby areas of undetected shallow water may not be included on the chart.

Only a small fraction of the 36 NAUTICAL CHARTS Figure 326a. Part of a “boat sheet,” showing the soundings obtained in a survey. Figure 326b. Part of a nautical chart made from the boat sheet of Figure 326a. Compare the number of soundings in the two figures. NAUTICAL CHARTS soundings taken in a thorough survey are shown on the chart, but sparse or unevenly distributed soundings indicate that the survey was probably not made in detail. See Figure 326a and Figure 326b Large blank areas or absence of depth contours generally indicate lack of soundings in the area.

Download PDF sample

American Practical Navigator by N. Bowditch


by Charles
4.3

Rated 4.30 of 5 – based on 49 votes