arm-and-hand signal

hand in hand

hand-to-hand combat

hand-to-hand fight(ing) (HTH/H2H)

hand signal

Signal Kit / MK-79 (illumination signal kit)

Make sure your motors spin up reliably on arm and in the correct direction

observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)

command and signal

caution and advisory panel / emergency warning signal unit

emergency warning signal unit / caution and advisory panel

sounding signal frequencies at C and X bands

reconnaissance and signal sergeant

command and signal matters

Beeps SOS when armed and TX is turned off or signal lost

Show signal strength, quality and status for each discovered GPS source

anti-radiation missile (ARM)

Arm (of armed forces)

arm support

combat arm

combat support arm

Fleet Air Arm

idler arm

logistical arm

pitman arm

power arm

primary arm

rocking arm

service arm; branch

support arm

arm band

strong-arm rule

supporting arm virtual trainer (SAVT)