From: W2DNE on Aug 27, 6:58 am

....why do the US Army Field Manuals provide instructions for setting up
SINGCARS-V radios in CW mode?

https://atiam.train.army.mil/soldier...iew/public/479...

Answer: THEY DO NOT for manual radiotelegraphy ("morse code").

FM 24-18 is a basic PRIMER on radio communications, an introductory
text which has been around for at least three decades. The version
approved for public distribution is dated 30 Sep 87, superseding
the one for 13 Dec 84. Much of the equipment mentioned is OBSOLETE
now and has been for decade(s). The AN/GRC-26D, for example, (an
HF station in a hut on the bed of a 2 1/2 ton truck) dates back to
the first half of the 1950s! The AN/PRC-70 manpack HF set went bye-
bye in the 1980s, replaced with the AN/PRC-104 designed by Hughes
Aircraft Ground Division.

There is NO "SINCGARS-V" in the U.S. military. You are confusing
"single-channel" as in one set, one operator, with the SINCGARS
family of SINgle Channel Ground Air Radio System that begins with
the manpack AN/PRC-119 (first operational 1989) and continues on
through two ground/vehicular versions (using same R/T) and two
airborne avionics versions. Just as the AN/PRC-77 replaced the
AN/PRC-25 VHF portable FM transceiver, the frequency-hopping
digitized voice/data (with selectable COMSEC internal) AN/PRC-119
replaced the PRC-77. The PRC-25 and PRC-77 were both used in the
Vietnam War that ended 30 years ago. The SINCGARS family is
perhaps the most produced of any military radio communications set
with 250 Thousand produced and fielded between 1989 and end of
2003 by ITT Fort Wayne, IN, and General Dynamics Ground Division
(now dissolved) in Florida. The PRC-119 is expected to be replaced
by the PRC-150 designed and built by Harris Corporation, NY.

SINCGARS sets, along with nearly every HF-VHF-UHF radio set designed
and built since WW2, have provisions for remote operation through
various interface-control equipments. When remote operation talks
about "CW" they do NOT mean manual radiotelegraphy as is common
in radio amateur parlance. "CW" in the military manual sense is
control over the basic CARRIER transmission. In actual practice
SINCGARS is used in small-unit operations (a few vehicles, squads)
and many may be in the same radio-range area but "separated" (non-
interference operation) by their digital/frequency-hopping option.
SINCGARS sets, manpack through airborne, have NO provision for
connecting any manual "morse code" key or sending any "morse code"
radiotelegraphy signals.

The U.S. military does NOT teach any manual radiotelegraphy skills
for communications purposes. It does teach radiotelegraphy
cognition for ELINT intercept-analysis as part of four MOSs for
Military Intelligence operations at the M.I. School in Fort
Huachuca, AZ.

FM 24-18 is a fairly good introductory handbook on radio for anyone
who wishes to learn basic radio facts and radio wave propagation
along with several types of antennas. It is a free download through
the Army Training and Doctrine Digital Library (in the given link)
and may be copied from military CDs containing Field and Techmical
Manuals (not fully public distribution) through LOGSA (LOGistics
Supply Agency). In particular, the "nevis" (pronounced version of
NVIS or Near Vertical Incidence Skywave) techniques used by U.S.
land forces radio since the 1970s; known colloquially as "cloud
burners" by amateurs.

Manual radiotelegraphy for communications is essentially "dead" for
every other U.S. radio service...except amateur radio. Accept that
and carry on. As you were...