There was apparently a progression of radios as the war wore on, Hue.  The list at https://aafradio.org/docs/Navy-radio-gear-1943.pdf stops at the later SBD-3 with a GP-7 and RU-19, but the Pilot's Flight Manual for the SBD-6 dated September 1, 1944 indicates this curious garble on page 21 by the preview "image to text" conversion software:



I read the "multiple-channel communications radio" as the interchangeable ARA-ATA/AN-ARC-5 at that point in time.  Unfortunately, it costs $10 bucks to get the whole pdf manual and I'm not that interested in finding the details behind this cryptic description.  I would venture to predict that the transmitter was the GP-7 prior to the changeover to the command set, but I wouldn't bet any money on it.

- Mike  KC4TOS

On 9/26/2022 10:29 PM, Hubert Miller wrote:

OH I pulled the trigger too soon. Text does not say SBD-5 had “two channel MHF”. SBD-5 is undefined more closely than “MHF”.

I am thinking, GP + RU.

-Hue Miller