The Receiver-Transmitter,radio, cataloged under National Stock Number 5820-01-601-6422, is classified within Federal Supply Class 5820 (Radio and Television Communication Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Undersea Systems International, Inc. Dba Ocean Technology Systems. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5820-01-601-6422 |
| Primary Part Number | 900408-002 |
| Item Name | Receiver-Transmitter,radio |
| FSC / FSG | 5820 / 58 — Radio and Television Communication Equipment, Except Airborne |
| Manufacturer | Undersea Systems International, Inc. Dba Ocean Technology Systems |
| Status | ACTIVE |
| Supplementary Features | NORMAL RANGE: 50-500 METERS DEPEINDING ON SEA CONDITIONS AND NOISE LEVELS;ULTRASOUND TRANSMISSION TYPE USING UPPER SINGLE SIDEBAND(USB);TRANMIT OUTPUT POWER 1/2 WATT PEP;STANDARD FREQUENCY (CHANNEL 1 FREQ. A): 37.768 KHZ USB, (CHANNEL 4 FREQ. B): 31.250 KHZ LSB; AUDIO BANDWIDTH 300-3,000 HZ; BATTERY TYPE (NOT INCLUDED) ALKALINE 9V OR ULTRA LITHIUM 9V OR 9V LI-POLYMER RECHARGABLE. KHz |
| Receiver Channel Quantity | 2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 900408-002 PRIMARY | Undersea Systems International, Inc. Dba Ocean Technology Systems (USA) |
| Reference | Meaning |
|---|---|
| MKII BUDDY PHONE D2 | 3/9 Design control — primary reference Undersea Systems International, Inc. Dba Ocean Technology Systems |
NSN 5820-01-601-6422 is a Receiver-Transmitter,radio, manufactured by Undersea Systems International, Inc. Dba Ocean Technology Systems, classified under FSC 5820, Radio and Television Communication Equipment, Except Airborne. Status: active.
NSN 5820-01-601-6422 has 1 manufacturer part number on file: 900408-002 (Undersea Systems International, Inc. Dba Ocean Technology Systems).
Key specifications for 900408-002: Supplementary Features: NORMAL RANGE: 50-500 METERS DEPEINDING ON SEA CONDITIONS AND NOISE LEVELS;ULTRASOUND TRANSMISSION TYPE USING UPPER SINGLE SIDEBAND(USB);TRANMIT OUTPUT POWER 1/2 WATT PEP;STANDARD FREQUENCY (CHANNEL 1 FREQ. A): 37.768 KHZ USB, (CHANNEL 4 FREQ. B): 31.250 KHZ LSB; AUDIO BANDWIDTH 300-3,000 HZ; BATTERY TYPE (NOT INCLUDED) ALKALINE 9V OR ULTRA LITHIUM 9V OR 9V LI-POLYMER RECHARGABLE. KHz; Receiver Channel Quantity: 2; Part Name Assigned by Controlling Agency: MKII-BUD BUDDY PHONE. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.