CIN: J-623-0028 CDP: 587P Course Syllabus DEAD RECKONING ANALYZER INDICATOR (DRAI) AND DEAD RECKONING TRACER (DRT) CIN: J-623-0028 CDP: 587P Course Syllabus

Course Overview This is a four (4) week course designed to provide skills and knowledge to operate, maintain, and repair the MK-9 Mod-4 Dead Reckoning Analyzer Indicator (DRAI) and MK-6 Mod-4C Dead Reckoning Tracer (DRT) under all shipboard readiness conditions.

Course Objectives At the completion of this course the trainee will have acquired a thorough knowledge of the DRAI Mk-9 Mod-4 and DRT Mk-6 Mod-4C, and corrective maintenance procedures, as well as the necessary skill to operate and manage these systems.

Course Outline 1. Basic Safety 2. AC & DC Circuits 3.  Special Devices & Circuits 4.  Synchros, Control Xformers, & Resolvers 5.  DRAI Introduction & Operation 6.  DRAI Maintenance and Circuit Analysis 7.  Six Step Troubleshooting / Tech Manual Familiarity 8. DRT Introduction & Operational Procedures 9. DRT Maintenance and Circuit Analysis

Course Prerequisites Rate: IC Paygrade E-1 to E9 Must have completed IC “A” School or all of the following: 1. Six months fleet experience with the DRAI 2. Completed appropriate rate training manual for 3rd Class Petty Officer. 3. Completed Navy Electricity and Electronics Training Series (NEETS) Modules 1,2,3,4,6,7,8,13, and 15.

Course Requirements To pass the course, students must maintain a grade of (70) or above. Testing consists of four (4) knowledge and two (2) performance progress tests. Remediation is provided for students experiencing difficulties with the course.

Course Timetable Week 1 Basic Safety and Lab Safety – AC / DC Circuit Review – Special Devices and Circuits – Digital Logic Devices and Applications – Synchros, Control Transformers, and Resolvers – Maintenance Manual Usage

Course Timetable (cont.) Week 2 – DRAI Introduction and Operational Mode Checks – Test Equipment – Power Distribution Circuit – OSS, OSH, OSD, and Own Ship’s Velocity Functions – Latitude and Longitude Functions – Sweep Clock Generator Card – Comparator Card

Course Timetable (cont.) Week 2 (cont.) – Computer Distance Ramp Counter – Total Distance and Calibration Card – Divider Counter Card – Coincidence Card – Solid State Step Transmitter – Power Supply Alignment – Servo Modulator Performance Ckts – Calibration Adjustment

Course Timetable (cont.) Week 3 – Six Step Troubleshooting Procedures – Troubleshooting the MK9 Mod4 DRAI – DRT Manual Usage – DRT Introduction and Operational Procedures – DRT Power Supply – Clipper Card – Buffer Card – Function Generator Card

Course Timetable (cont.) Week 4 – Pulse and Drive Card – Distance Scaler – Dual Step Motor Drive Card – Longitude Computer – Phase Detector Card – DRT Waveforms and Voltages – Optical System – Troubleshooting the MK 6 Mod 4C DRT

Contact Information/Links For additional information, contact: Course Supervisor: IC1(SW) Ertle DSN: 526-9979 COM: (619) 556-9979

Preparing to Attend the Course In order to maximize the benefit from the course, it is recommended that the prospective student be familiar with the following: Preventative Maintenance System for DRAI Mk-9 / DRT Mk-6 Maintenance Index IC-11/P5 and IC-11/P6 NEETS Volume 1 - Introduction to Direct Current NEETS Volume 2 - Introduction to Alternating Current and Transformers NEETS Volume 7 - Introduction to Solid-state Devices and Power Supplies