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ET 'A' School Course Description

ET 'A' School Course Overview

These courses provide technical training on specific electronic systems and equipment used throughout the Coast Guard. These courses encompass the use of test equipment, technical publications and troubleshooting methods used for corrective maintenance to the lowest repairable level. Upon graduation students have the knowledge and skill necessary for maintenance and repair of electronic equipment.

ET "A" School is 28 weeks in duration.

Unit 1 Fundamentals 20 days
Unit 2 Advanced Circuits 13 days
Unit 3 Receivers 21 days
Unit 4 RT-9000 24 days
Unit 5 Systems/Crypto 13 days
Unit 6 SINS 20 days
Unit 7 VHF 13 days
Unit 8 Soldering 10 days


Q: Are there any prerequisites? Security clearance? Eyesight?

A: Eligibility:
1.  Armed Service Vocational Aptitude Battery (ASVAB) Minimums:
     MK + EI + GS = 172 w/ AR = 52; OR an AFQT = 65.
2. Clearance requirements: Must be eligible for a final SECRET clearance.
3.  Students must possess normal color perception.


Students must complete all E-4 EPME and Time in Service requirements (tests and practical factors) prior to graduation to advance to ET3. 

ET 'A' School Curriculum Outline

Unit 1: Fundamentals
Unit topics include direct and alternating current, beginner electronics vocabulary, electrical safety fundamentals including CPR certification, test equipment usage, simple circuit analysis, power supplies, and basic troubleshooting techniques.

Unit 2: Advanced Circuits

Topics include semiconductors, transistors, multistage amplifiers and regulated power supplies.  Various digital circuits including numbering systems, logic circuits, flip-flops, multivibrators, and shift registers are covered.

 Unit 3: Receivers

Teaches basic principles of communications, modulation, mixers, IF filters, amplifiers, demodulation and audio amplifier circuits. RF Principles also teaches antenna transmission concepts, and antenna maintenance. Students utilize a NIDA Lab Model HF Receiver and a Harris Corp R-2368 to practice signal tracing and troubleshooting.

Unit 4: RT-9000

Students learn the primary building blocks of a transceiver and apply this knowledge to the RT-9000 HF transceiver system. Students will perform corrective and preventive maintenance to the receiver, transmit, synthesizer, and the power supply section of the transceiver. Students will also be introduced to modulate and demodulate devices (MODEMS) and remote operations of the RT-9000.

 Unit 5: Systems/Crypto

This unit teaches operation and limited maintenance on cryptographic equipment including KG-84C, ANDVT, KY/HYX-58, and AN/CYZ-10 DTD, down to card level. Students are taught how to set up equipment in an HF voice or data system in a simulated communications suite, along with troubleshooting and isolating faulty equipment within the system.  All ET “A” graduates are assigned the COMSEC competency and receive official authorization to work on this equipment upon graduation.

Unit 6: SINS

This unit introduces RADAR, GPS, Depth Sounders, and NMEA fundamentals, using the Scalable Integrated Navigational System (SINS) installed on Coast Guard small boats as the training platform. In order to become familiar with the concepts, students learn and demonstrate proper operation, preventive maintenance, and corrective maintenance of the SINS.

Unit 7: VHF

Concepts introduced in this unit include the operation and maintenance of direction finders and secure VHF transceivers including antenna and coaxial cable system troubleshooting. Current Coast Guard electronics logistics systems are covered to include ALMIS, CMPlus, and FEDLOG.  Students are also trained in basic tower climbing.

Unit 8: Soldering

Basic soldering workbench techniques are covered.  All common coaxial and multi-conductor cable connectors are studied. There is extensive lab performance testing of soldering techniques and connector building.

Last Modified 1/12/2016