GR-3

Components

• BD-62 switchboard
• BD-85 switchboard
• IE-14 oscillograph
• AR-8 lightning arrestor
• BK-9 relay unit
• M-166 oscillograph
• T-21 mic.
• CD-250
• CH-44, 45, 46, 47, 48.
• BG-74
• BG-97 Mic. bag
• BE-66
• BE-51
• BE-71

References

• TM 11-444 Sound Ranging Set GR-3-C (12 June 1943); 72 pages

• File:SIG 7-GR-3.pdf

• File:SIG 8-GR-3.pdf