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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Electricity - Basic Navy Training Courses

Here is the "Electrician's Mate 3 - Navy Training Courses" (NAVPERS 10548) in its entirety (or will be eventually). It should provide one of the Internet's best resources for people seeking a basic electricity course - complete with examples worked out. See copyright. See Table of Contents.

- U.S. Government Printing Office; 1949

Electrician's Mate 3 - Navy Training Courses NAVPERS 10548

Introduction by Kirt Blattenberger

In January of 1945, my father-in-law, Marlet Goodwin, enlisted in the Merchant Marines and spent two years working in the "belly of the beast" in the engine rooms of the ships on which he sailed. He recently passed on to me some of the training manuals that he received while in the Merchant Marines and later while in the Naval Reserves. Some of the information contained in those manuals are amazingly detailed - both for mechanical and electrical systems. Since the basics have not changed much over the past 70 years, I thought it might be useful to make some of the content available here.


Electrician's Mate 3 - Navy Training Courses NAVPERS 10548 - Bound EdgeElectrician's Mate 3 - Navy Training Courses NAVPERS 10548 - Front CoverGovernment publications are considered to be in the public domain, and may be freely redistributed so long as credit is given*. Accordingly, I have undertaken the task of scanning and publishing the content of the Electrician's Mate 3 course here. Other manuals will be added as time permits. The time consumed in doing so is extensive. Each page was scanned once to do an optical character recognition (OCR) processing on it, and then again to obtain the images (OCR tries to interpret images as text and makes a real mess there). Although anyone may freely copy a government publication, no one may copy my version of the publication of it. If you want to publish content from the manuals, you must scan your own images and create your own duplicate text. However, I welcome anyone to print out these complete pages for use in self-study, or even as part of a classroom course - just be sure to give proper credit.

Here is the "Electrician's Mate 3 - Navy Training Courses" (NAVPERS 10548) in its entirety (or will be eventually). It should provide one of the Internet's best resources for people seeking a basic electricity course - complete with examples worked out (links to quizzes at end of chapters).

Electrician's Mate 3 - Navy Training Courses


This book is written to aid the striker for Electrician's Mate 3 to qualify for advancement to that rate. The combination of this training course and practical experience will enable the striker to meet the official requirements for advancement to EM3. These requirements, as given in The Manual of Qualifications for Advancement in Rating (NavPers 18068), are reproduced in appendix II. This course is based on an elementary knowledge of electricity and mathematics. Therefore, before starting this course the striker should complete the two basic Navy Training Courses, Electricity, NavPers 10622, and Mathematics, NavPers 10620. The duties of an Electrician's Mate also require an elementary knowledge of machines, tools, and blueprints. Hence, while studying this course, the striker should review these additional basic Navy Training Courses-Basic Machines, NavPers 10624; Use of Tools, NavPers 10623; and Use of Blueprints, NavPers 10621. . This training course presents the basic phenomena of direct current necessary for an EM3 to perform his duties on direct current machinery. He should also have a similar back-ground on alternating current machinery. Such background he will find in the appropriate chapters of the Navy training course for Electrician's l.1ate 2c, NavPers 10103. As one of the NAVY TRAINING COURSES, this book represents the joint efforts of the Training Publications Section of the Bureau of Naval Personnel and of those Naval establishments specially cognizant of the technical aspects of Electrician's Mates' duties.


CHAPTER 1       Electrical currents and circuits - Ohm's Law

CHAPTER 2       Magnetism

CHAPTER 3       Electromagnetism and magnetic circuits

CHAPTER 4       lnduction

CHAPTER 5       Alternating and direct current generators

CHAPTER 6       Direct current generators

CHAPTER 7       Types of direct current generators

CHAPTER 8       Operation of direct current generators

CHAPTER 9       Direct current motors

CHAPTER 10     Maintenance of direct current motors and generators

CHAPTER 11     Page Direct current controllers

CHAPTER 12     Cables

CHAPTER 13     Batteries

CHAPTER 14     Electrical systems in small craft

CHAPTER 15     Searchlights

CHAPTER 16     Blueprint reading and sketching

CHAPTER 17     Safety precautions

APPENDIX I      Answers to quizzes

APPENDIX II     Qualifications for advancement



If you are in the Regular Navy, you will be striking for the general service rating (EM). To meet the qualifications for 3rd class in this rating (see column EM, appendix II) you will have to study all the chapters in this book. If you are a member of the Naval Reserve you will be striking for either the emergency rating as power electrician (EMP) or shop electrician (EMS). To meet the qualifications for EMS you have to study all the chapters of this book except chapter 11 (D. C. Controllers). For EMP3 rate you have to study all the chapters except chapter 10 (Maintenance of Direct Current Motors and Generators). However, to gain a well-rounded view of the duties of the general service rating, it is recommended that you also read the additional chapters 10 or 11, which do not pertain directly to your rating.

* Relevant excerpt from the www.cendi.gov website.

Frequently Asked Questions About Copyright Issues Affecting the U.S. Government CENDI/2004-8 Updated March 2007

2.2.4 What is public domain? Public domain refers to works that are not protected by copyright and are publicly available. They may be used by anyone, anywhere, anytime without permission, license or royalty payment.

A work may enter the public domain because the term of copyright protection has expired (see FAQ Section 2.1.6), because copyright has been abandoned, or in the U.S. because it is a U.S. Government work and there is no other statutory basis for the Government to restrict its access (see FAQ Section 3.1.5).

A work is not in the public domain simply because it does not have a copyright notice. Additionally, the fact that a privately created work is, with permission, included in a U.S. Government work does not place the private work into the public domain. The user is responsible for determining whether a work is in the public domain.

It is important to read the permissions and copyright notices on U.S. Government publications and Web sites. Many Government agencies follow the practice of providing notice for material that is copyrighted and not for those that are in the public domain. Examples of government agency copyright policies and statements are: National Library of Medicine,38 NASA Center for AeroSpace Information (CASI),39 and Library of Congress.

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