| DOCUMENT IDENTIFICATION | 91912/A/ |
| DOCUMENT SOURCE | 10001 |
| DOCUMENT TYPE | INSTRUCTION BOOK |
| EMISSION TYPE | AO AND A1 AND A2 AND A3 AND F1 AND F2 AND F3 AND P0 AND P1 |
| AC VOLTAGE RATING | 115.0 VOLTS NOMINAL |
| CHANNEL QUANTITY | 1750 |
| FREQUENCY RATING | 55.0 HERTZ MINIMUM AND 65.0 HERTZ MAXIMUM |
| INDICATOR TYPE | AUDIO AND CATHODE RAY TUBE |
| INTERNAL BATTERY ACCOMMODATION | NOT INCLUDED |
| INSTALLATION DESIGN | FIXED AND SEABORNE |
| JOINT ELECTRONICS TYPE DESIGNATION SYSTEM ITEM NAME | DIRECTION FINDER SET |
| JOINT ELECTRONICS TYPE DESIGNATION SYSTEM ITEM TYPE NUMBER | AN/URD-4 |
| OPERATING FREQUENCY | 225.000 MEGAHERTZ MINIMUM AND 399.900 MEGAHERTZ MAXIMUM |
| PHASE | SINGLE |
| VEHICLE FOR WHICH DESIGNED | SHIP |