Isn't broken arrow a term used to refer to a nuclear missile mistakenly launched, or something similar to that?
Broken Arrow = lost nuclear weapon
Give this some thought...
BROKEN ARROW: Dictionary Entry and Meaning
Computing Dictionary
Definition: The error code displayed on line 25 of a IBM 3270 terminal (or a terminal emulator emulating a 3270) for various kinds of protocol violations and "unexpected" error conditions (including connection to a down computer). On a PC, simulated with "->/_", with the two centre characters overstruck.
"Broken arrow" is also military jargon for an accident involving nuclear weapons.
[Jargon File]
See Also: communications